Mixture Definition and 294 Threads

In chemistry, a mixture is a material made up of two or more different substances which are not chemically combined. A mixture is the physical combination of two or more substances in which the identities are retained and are mixed in the form of solutions, suspensions and colloids.Mixtures are one product of mechanically blending or mixing chemical substances such as elements and compounds, without chemical bonding or other chemical change, so that each ingredient substance retains its own chemical properties and makeup. Despite the fact that there are no chemical changes to its constituents, the physical properties of a mixture, such as its melting point, may differ from those of the components. Some mixtures can be separated into their components by using physical (mechanical or thermal) means. Azeotropes are one kind of mixture that usually poses considerable difficulties regarding the separation processes required to obtain their constituents (physical or chemical processes or, even a blend of them).

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  1. A

    How Do Mixtures Form and What Are Their Properties?

    Homework Statement What and how does a mixture form. Homework Equations a mixture can be formed by anything
  2. D

    Calculating Final Temperature of a Mixture with Phase Change

    Homework Statement What is the final temperature of a mixture made from 3kg of ice at -5ºC and 10.8kg o fcopper at 2000ºC. The melting point of copper is 1083ºC. Homework Equations Q=mct(delta)t mc(delta)t + mc(delta)t = 0J m=mass c=specific heat delta t = temperature change...
  3. B

    Titration method to determine HCl concentration in a mixture

    I have a solution which contains unknown amount of dissolved ferric chloride (FeCl3) and hydrochloric acid. Can I use the titration method with NaOH to determine the concentration of HCl? I was concerned since dissolved FeCl3 is also acidic, and the fact that NaOH will try to neutralize it...
  4. V

    Calculating Final Temp of a mixture

    Homework Statement A 22.0 g sample of ice at -12.0°C is mixed with 120.0 g of water at 86.0°C. Calculate the final temperature of the mixture assuming no heat loss to the surroundings. The heat capacities of H2O(s) and H2O(l) are 2.08 and 4.18 J/g°C, respectively, and the enthalpy of fusion...
  5. S

    Calculating vrms of Helium in Mixture of Gases

    Homework Statement A gas bottle contains a mixture of Helium and Oxygen molecules (O2 is diatomic). The root-mean-square velocity for the O2 molecules is 482 m/s. Find vrms for the Helium atoms. Homework Equations 1/2mv^2=1/2mv^2 and solve for velocity of He, however, i am not...
  6. V

    Composition of a Mixture by Acid-Base Titration

    A 1.00-g solid sample containing a mixture of table salt (NaCl) and citric acid (H3C6H5O7, a triprotic acid) is dissolved in 15 mL of water. Titration of the acid solution requires 40.00 mL of 0.2003 M NaOH solution to reach the endpoint. Calculate the mass percent H3C6H5O7 in the solid...
  7. P

    How Does Dew Point Change in a Gas Mixture of Different Proportions?

    Dear All... For my first post in this forum I have choosen an easy question for you all! If I have a gas at room temperature and I start to compress it, when the gas reach its dew point, condensation starts What about for a gas mixture?? I try to be clear! I have two real gasses: A &...
  8. M

    If I have a mixture of benzoic acid and benzil, and. .

    If I have a mixture of benzoic acid and benzil, and I add dichloromethane to it and extract it using sodium hydroxide, the benzoic acid reacts with the sodium hydroxide to form sodium benzoate, but what does the benzil react with. I know that its in the organic layer because it's neutral but...
  9. J

    Equilibrium Concentration of NO in N2/O2 Mixture at 2000 K

    Considering the following N2+ O2= 2NO at 2000 K is 4.0 × 10-4. Consider an initial mixure of 10 moles of N2 and and one mole of O2. How do I find the concentration of NO in the equilibrium mixture in ppm? thank you:confused:
  10. N

    Calculating Concentration of CO in a Mixture

    CO oxidation ?? There are two cylinders. First is a CO cylinder having pure 99.97 CO gas and second having zero air. CO is given at 0.1LPM rate and air at 0.9LPM. what is the concentration of CO and what percentage in this mixture?? How to figure it out?
  11. L

    Does a Warm Gasoline and Air Mixture Rise in a Cooler Environment?

    Hello, I have a question about the following statement: "It is well known that warm air in a cooler environment rises. Now consider a warm mixture of air and gasoline on top of an open gasoline can. Do you think this gas mixture will rise in a cooler environment?" I would say Yes, the...
  12. V

    How to prepare the mixture of inorganic material

    how to prepare the mixture of inorganic material i had a question where i want to mix three diferent inorganic material which are tungstosilicic acid, aluminium oxide and silica oxide.. Can i mixed the three inorganic material without pre-treatment? wat is the suitable process to...
  13. V

    How to prepare the mixture of inorganic material

    i had a question where i want to mix three diferent inorganic material which are tungstosilicic acid, aluminium oxide and silica oxide.. Can i mixed the three inorganic material without pre-treatment?:confused: wat is the suitable process to prepare a mixture of this inorganic material??
  14. R

    Separate Water from Carbon Tetrachloride by Fractional Distillation

    Can I separate water from Carbon tetrachloride by the method of fractional distillation? (I agree separating funnel is a better method)
  15. R

    Quantatative Analysis of LiCl and LiBr Mixture

    Homework Statement A 1.5000g sample of a mixture of lithium chloride and lithium bromide was dissolved in water and treated with a 0.1 M AgNO3 solution. The resulting precipitate was filtered, washed, dried and weighed. It weighed 4.463g. A second 1.5000g sample of the mixture was treated...
  16. J

    How Do You Calculate the Mass of Each Gas Component in a Heated Mixture?

    1. A mixture at T=300 K and P=100 kPa is made up of .1 oxygen, .2 carbon dioxide, and .7 Nitrogen. It is then heated to 300 kPa and 500 K. Find the mass of each component I originally thought using PV=NRT, ideal gas but there doesn't seem to be enough givens. Can you also find the molar...
  17. J

    Statistical Mixture of N States in the Hartree-method.

    In the Hartree model of interacting electrons one assumes that the wave function is in the form \Psi(x_1, x_2, ..., x_N,t) = \psi_1(x_1,t) \psi_2(x_2, t) ... \psi_N(x_N,t) which of course is a quite crude approximation since it for example does not take into account Pauli principle. I...
  18. E

    Calculating Specific Heat Capacity of Oil-Water Mixture

    i am not sure if my question fits in this place. if i have certain amounts of water and oil, 3kg and 4kg. i mix them together, and i want to find the specific heat capacity of the mixture, according to my book the specific heat capacity of such a mixture is the sum of the two specific heat...
  19. T

    Calculating How Long Scuba Divers' O2 and He Mixture Will Last

    Hi, I have been struggling a little with this question. Scuba divers breathe a mixture of O2(g) and He(g) to avoid "the bends, a condition caused by nitrogen in the blood. If 65.0g O2(g) and 2.00g He(g) are placed in a 5.0L tank at 25oC, calculate: If the average human takes 15 breaths...
  20. T

    Chemistry Calculating % of KCLO3 in a Mixture

    I had this wuestion last week for homework and didnt get the answer because i was not at school today. Any help would be greatly appreciated A 12.00g sample of a mixture of KCLO3 and KCL is heated until all the oxeyen has been removed from the sample. The product, entirely KCL, has a total...
  21. P

    Understanding Mixture Problems: Solving for Tank Overflow Time

    Hello, I think this is a pretty easy question here that I think I may be just overlooking. I am asked this huge drawn out DE problem about a tank being filled with water and brine and I am asked to solve all these different parts. My problem is that the first part of the question asks to...
  22. L

    Solving Gas Mixture Problem: 10g Ca(ClO3)2 + Ca(ClO)2

    I spent quite a bit of time trying to figure this out, but I just can't seem to get this question: When a 10.0g mixture of Ca(ClO3)2 abd Ca(ClO)2 is heated to 973 Kelvins in a 10.0 L vessel, both compounds decompose, forming O2 and CaCl2. The final pressure inside the vessel is 1.00 atm. What...
  23. C

    Determining Potassium Chlorate in Unknown Mixture

    Say you were given an unknown mixture of potassium chlorate and potassium chloride. First off what would the formula for this reaction be. Second how would one determine the experimental percentage of potassium chlorate in the unknown sample, the emperical formula, the number of moles of...
  24. P

    Mixture of saturated liquid and saturated vapor

    In the figure that shows saturated vapor and liquid condition under varying temperature and specific volume (constant temperature), there are 2 lines, 1 is saturated liquid line, the other is saturated vapor line. so the region in between these 2 lines is called the mixture of saturated liquid...
  25. T

    Which Groups Contain an Element, Compound, and Mixture?

    Which 2 groups of substances below contain 1 element, 1 compound and 1 mixture? pick 2 groups. A.) Gold, sodium chloride, steel B.) oxygen, iodine, air C.) methane, iron(III)chloride, sea-water D.) Helium, carbon(IV) oxide, mixed dessert E.) Bronze, stainless steel, nitrogen(IV)oxide i...
  26. T

    Chemistry Mixture: Identifying the Incorrect Statement

    Regarding about the Mixture. Question goes: Statement concerning a mixture is INCORRECT. only one statement is incorrect. which one? A.) It has a variable composition by mass. B.)It boils over a range of temperatures. C.)It has properties that are entirely different from those of its...
  27. T

    Is there any energy involved in the formation of mixture?

    :confused: 1.) Is it possible for the number of neutrons and the number of protons to be equal? 2.) Is it possible for the mass number(nucleon number) and atomic number(proton number) of an atom to be equal? 3.) Is there any energy invovled in the formation of mixture? 4.) does...
  28. P

    Mixture Formula: Combining 2+ Fluids

    What is the mixture formula when combining two or more fluids? Thanks Pavdarin
  29. Pengwuino

    Help Needed: Balancing pH of Acetic Acid & NaOH Mixture

    I have a question here and i don't really know how to do it. I need to know : What is the pH of a mixture of 30ml 0.1M acetic acid and 30ml of 0.1M NaOH? \[HC_2 H_3 O_3 = 1.8*10^{ - 5} \] I'm not even sure what the equilibrium equation would be! Any help would be appreciated.
  30. I

    Confused about Mixtures and Substances? Get Help Now!

    A mixture is defined as 2 substances that are arbitirarily combined. They are either homogenous or heterogenous. A substance is defined as being homogenous and has definite, fixed composition that is NOT arbitrary. On some classwork we did, this following was stated as being true: wood...
  31. B

    Bored in math class, figured out mixture problems.

    Mixture problem example: You need parts of a 30% chlorine and 55% chlorine mixture to make 100 gallons of a 40% chlorine. mixture. To figure out what the ratio of 30 to 55 is: 55% - 40% = 15 parts needed of 35% mixture, 40% - 30% = 10 parts of 50% mixture. 15 parts of 30% reduces to 3...
  32. B

    Mixture Problem (differential equations)

    Q: A large tank initially contains 100 gal of brine in which 10lb of salt is sissolved. Starting at t=0, pure water flows into the tank at the rate of 5 gal/min. The mixture is kept uniform by stirring and the well-stirred mixture simulaneously flows out at the slower rate of 2 gal/min. a)...
  33. N

    Basis of degree of freedom for monoatomic and diatomic mixture

    hi guys 16 grams of helium gas is mixed with 16 grams of oxygen... what will be the ratio Cp/Cv of the mixture... how to calculate it?? i thought on the basis of degree of freedom for monoatomic and diatomic mixture...but that can take me to the answer only by...
  34. P

    Gibbs' Paradox and Ideal Gas Mixture Entropy

    Hi all. About Gibbs' paradox (with the mixture entropy for ideal gases): Is the paradox a Thermodynamic paradox? Because what's bothering me is that in Thermodynamics, the entropy is determined up to a "constant", allegedly, \[ S_0 \] , which in my opinion is dependent of \[ N \] ...
  35. C

    Will a precipitate form wiht this CaCl2 and NaOH mixture

    The solubility product calcium hydroxide, Ca(OH)2 is 7.9 * 10tothe-6 at 25degcel. Will a precipitate form when 100mL of 0.10mol/L of CaCl2 solution and 50.0mL of 0.070 mol/L of NaOH solution are combined?
  36. Clausius2

    Binary Gas Mixture Physical Properties & Local Viscosity, Diffusitivity

    I am searching for the physical properties of a binary gaseous mixture. In particular, I would want to know the local viscosity \mu and local mass diffusitivity D of any binary mixture of gases, as a function of the local mass fraction of each other. I have not found nothing in Google...
  37. B

    Determine the final temperature of the mixture homework

    A combination of 0.250 kg of water at 20*C, 0.400 kg of aluminum at 26.0*C, and 0.100 kg of copper at 100*C is mixed in an insulated container and allowed to come to thermal equilibrium. Ignore any energy transfer to or from the container and determine the final temperature of the mixture. I...
  38. X

    Questions about the separating mixture

    As we know, there are several method for separating mixture(separation) for different cases, they are Filtration, Evaporation, Crystallization, Distillation, Fractional distillation, using Separating funnel to separate two immiscible liquids and Paper chromatography to separate small amount of...
  39. D

    Homework help with mixture problem

    I need help setting this problem up. I keep coming up with the wrong answer. I know it is suppose to be either a separable or linear differential equation. Can anyone help me get it set up right? I think its suppose to be a linear 1st order diff equation. A 100 gallon tank is filled with...
  40. W

    Finding the Final Temperature of a Water Mixture: A Chemistry Problem

    Hi all, i often help out in the chemistry section, was wondering if you could help me with a question: A vessel of thermal capacity 500 J/oC contains 0.5 kg of water at 50oC. 0.2 kg of water at 20oC is added and perfectly mixed with the hotter water. In this process, heat is lost by the...
  41. J

    Mixture of pure nitric acid and pure hydrochloric

    Hi People, Could someone please give me a hand with this question : Explain why a mixture of pure nitric acid and pure hydrochloric (VII) acid (HClO4) contains H2NO3(+) ions and ClO4(-) ions. Thanks a lot, Joe
  42. C

    Homogenous mixture and a heterogeneous mixture

    Hello all I was just wondering what is the difference between a homogenous mixture and a heterogeneous mixture. For example: a. sea water b. tomato juice c. gasoline d. milk What type of mixtures are these? Also, what do we classify fire as (solid, liquid, gas)? Any help...
  43. C

    Difference between a homogenous mixture and a heterogeneous mixture

    Hello all I was just wondering what is the difference between a homogenous mixture and a heterogeneous mixture. For example: a. sea water b. tomato juice c. gasoline d. milk What type of mixtures are these? Also, what do we classify fire as (solid, liquid, gas)? Any help...
  44. N

    Calculate Enantiomeric Excess (EE) of Penicillin G Mixture

    The question reads: The optical rotation of pure pencicillin G is +206 degrees. A sample of pencillin G was found to have an optical rotation of +103 degrees. Calculate the enantiomeric excess (ee) in the mixture. I did so by: 103/203 x 100 = 50% Here is where I am lost: Next...
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