Aqueous Definition and 60 Threads

I heard an explanation about something being a better proton acceptor or lone pair donor but that doesn't make sense. I couldn't explain in in terms of acid-base theory. The hand-waving way I saw it was that metals are less electronegative than non-metals, so in water, they'll donate their...

TL;DR Summary: Used M1V1=M2V2 but am unsure if formula applies I feel like I could use M1V1=M2V2 but the 18% by weight ammonium hydroxide is confusing me so much. Density of ammonium hydroxide 18% is 0.926 g/cm3 18%V1=16mg/L*200L (18mg ammonium/100 mg of total solution) * V1 = 3,200mg...

How can i make an Aqueous solution of tolyltriazole? i need to make an Aqueous solution of tolyltriazole, but its solubility in water i very low. It dissolves with increasing temperature (50(c)) and redeposits with decreasing temperature. Some sodium hydroxide was added to the solution to...

Homework Statement >Which of the following aqueous solutions would test closet to 7 on the pH scale? $a) NaCl$, $b) Na_2CO_3$, $c) NaH_2PO_4$, $d) NaCN$ Homework EquationsThe Attempt at a Solution I don't understand this. So I tried writing chemical equations like for a), NaCl + H20 --> NaOH +...

This is question that can't really get a precise answer without significant modeling or experimentation, but I'm wondering what folks' intuition might be on an answer to the following setup + question: Suppose there is a steel tank made of steel pipe with walls about 0.25 cm thick, internal...

What is the difference between aqueous solution and liquid solution? Note:I am a high school student and English is my second language. Thanks in advance!

hi i am trying to figure out the way to calculate the freezing point of an aqueous solution which have 5 different components. if someone can refer me to an example or give me and example it will be great thanks in advance sharon

I have found a lot of data and graphs showing conductivity (micro-mhos) vs % by weight of various salt solutions. The salts for which graphs appear particularly linear are those of alkali Earth metals - eg sodium, potassium - KI, KBr, KCl etc. Is there a theoretical equation for conductivity vs...

How would a super-critical heavy water cooled and moderated two fluid aqueous homogeneous reactor with nitrate fuel work? Silicon carbide or alumina can be used as cladding for the internal seed core and blanket walls, with the silicon carbide on the blanket wall cladding stainless steel and...

What are we referring to when we denote, say, NaCl (aq)? Are we referring to the dissolved NaCl (Na+ and Cl-)? Are we speaking of the solution as a whole (the dissolved NaCl and water)? Also, how does the liquid state differ from an aqueous?

Looking for any life expectancy data for water soluble flux going low Z. How long it takes for conductive material to migrate and cause low impedance bridges at any humidity or temperature.

Homework Statement We're given an unknown acid, and dissolve an unknown mass of the acid in an unknown amount of water. We then titrated the solution with an unknown molarity solution of NaOH. After titrating in 10.0 mL of NaOH, we measure a pH of 5. After 34.68 mL of NaOH, we realize we...

I'm testing Ammonium Bicarbonate in a fermentation process. Is it possible for Ammonium Bicarbonate to 'salt out' Ethanol? Compounds such as Sodium Carbonate and Ammonium Sulfate are able to salt out ethanol.

Question In a container of capacity 1-Litre, air and some liquid water is present in equilibrium at total pressure of 200 mm of Hg. This container is connected to another 1-Litre evacuated container. Find total pressure inside the container when equilibrium is again stabilized. Aqueous Tension...

I know aqueous Ammonium Bicarbonate forms when NH4+ and HCO3- ions are present in water after they've dissolved from their gaseous states of NH3(g) and CO2(g). This occurs in the reaction: NH3(g) + H2O(l) + CO2(g) => (NH4)HCO3(aq) If Ammonia gas and CO2 are present above a polar organic...

According to my chemistry textbook, the I- ion is discharged at the anode. Yet, according to standard electrode potential values, the OH- ion should be discharged at the anode. Thoughts on this please?

I am doing a project in Chemistry and I need to use Hess' Law to cancel two equations and if in one equation the NH4NO3 is solid and in the second one the NH4NO3 is aqueous. The equations are: 1: NH4NO3 (s) + HCl (aq) --> HNO3 (aq) + NH4Cl (aq) 2: NH4OH (s) + HNO3 (aq) --> H2O (l) + NH4NO3...

So if we have an ion, say Cl- in solution, and we have a membrane immersed into the solution. Apparently there is a method in which any ion, of any charge is inhibited from crossing the membrane because it induces the same charge as itself on the membrane. This is called dielectric...

Homework Statement If dilute, aqueous magnesium bromide is electrolyzed, one product is formed at each electrode. Identify the product, state the electrode it occurs at (anode or cathode) and state a reason for your choice of product. Homework Equations Mg2+(aq) + 2e- --> Mg(s) E°red = -2.37 V...

Homework Statement A sample of an aqueous solution of sodium halides is added to a sample of an aqueous solution of silver nitrate, resulting in a precipitation. To the mixture containing the precipitation was added a sample of an aqueous solution with ammonium hydroxide, dissolving the...

I'm just beginning to learn general chemistry, and I'm reading my textbook's chapter on aqueous solutions. My question is, why do we term a solution of an ionic compound (like NaCl) like this: NaCl(aq) instead of: Na+(aq) + Cl-(aq) ? Technically, when the sodium chloride is...

I have two problems. Homework Statement How many moles of Na2CO3 must be dissolved in 250 mL of 0,125 M NaHCO3 so that the solution has a pH of 10,00? Homework Equations The powers of the concentrations are the coefficients in the chemical equation. The products of the...

What does "aqueous workup" mean? I'm taking a second year organic chemistry and it's a slightly advanced level but I didn't take the 1st year advanced level org.chem. so I may have missed a couple of common terms. What I don't understand is what does workup mean? At the end of some reaction...

Determine the equilibrium pH of aqueous solutions for the following strong acids or bases: (a) 257mg/L of HSO4- ; (b) 10nM NaOH ; (c) 75ug/L of HNO3

Ok, So I am a junior chemistry major doing organic research, but my question hasn't really occurred in organic lab and is really more microbiology related, but I assume chemists in certain fields have either run across this problem or already know how to prevent this from happening. I have a...

Hey there, My textbook doesn't expand on this much and I'm unsure if I'm just not seeing some obvious connection; I'd appreciate it if someone could clarify this for me. I'm studying the Bronsted-Lowry theory and the strength of binary and ternary acids. I understand how, for example, H2SO4...

Q : write products formed when polyester is heated with aqueous sodium hydroxide I know is hydrolysis , and the product will be alcohol and carboxylic acid ... but will the -OH in carboxylic acid replaces with -ONa or not ?? It say heated with , but doesn't mean react .. so does heated...

Hello, I understand that this question may seem rather obvious for some. Nonetheless, it is something that seems to have thrown me off a number of times. When writing chemical equations involving acidic or basic solutions, I know that the acid on the reactant side is written with the state...

I had these two questions in a test and I was completely stumped. 1. Make a 1-2L buffer solution containing methanoic acid and methanoate ions and with a pH of 3.74 using 1.07molL-1 HCOOH, solid HCOONa, 1.04molL-1 HCl, 1.16molL-1 NaOH(not all together). pKa(HCOOH)=3.74 M(HCOONa)=68gmol-1...

I have just carried out a lab experiment today and desperately need some help! 1. The Experiment: In my experiement I attempted to mix a solution of hexane with aqueous bromine. I started off by adding 15 drops of bromine into a test tube and then added 7 drops of hexane ontop of that...

Homework Statement What are the final hydrogen ion concentration and pH of of a solution obtained by mixing 400 mL of 0.2 M NaOH with 150 mL of 0.1 M H3PO4? pKa's are 2.12, 7.21, 12.32 Homework Equations Henderson-Hasselbach: pH = pKa + log [b]/[a] The Attempt at a Solution 0.2 M...

Hy ! I have a problem and I need ur help.I tried to evaporate the water from a solution using the rotary evaporator but it didnt work.I don't know what i did wrong.Maybe u can help me or tell me which other method can I use? Thank u Greetings

Hi, alcohol is able to react with Na (s), but not NaOH (aq) Why is it so? In aqueous NaOH, there are mobile Na+ and OH-, so shouldn't alcohol be able to react with Na+ to form salt too? Many thanks!

Homework Statement The solubility constant for AgBr in water is 5.2 x 10-13. What is the aqueous solubility of AgBr? Homework Equations Ksp= [Ag+][Br-] AgBr is a constant and therefore is not part of the Ksp.The Attempt at a Solution NVM solved problem. Should use ICE table.

Homework Statement When 200 cm^3 of an aqueous solution X with concentration 10.0 g/dm^3 was shaken with 100cm^3 of solvent 1-pentanol , 1.60 g of X was extracted . If the aqueous solution was once again shaken with 100 cm^3 of 1-pentanol after the first extraction , what is the mass of X...

Hello guys, So there are hydrogen ions inside the cell which is pumped out in cellular respiration. Now my question is when they say hydrogen ions are inside the cell are these actually dissolved in water, ions can not exist without being dissolved right, why is that they are so reactive...

Homework Statement In lab we recorded a barometric pressure of 768.2 torr. Suppose we didn't have access to a barometer and assumed that atmospheric pressure was 760 mm Hg. Would the mass percent of hydrogen peroxide that you calculated for the solution be higher or lower than the value you...

[Solved] pH of Aqueous Solution Homework Statement Calculate the pH of the following aqueous solution prepared by adding 3.0L HBr(g), measured at 27 degrees Celsius, 757 mmHg pressure, to sufficient water to give 0.10L of solution. Homework Equations pH = -log[H+] The Attempt at a...

Homework Statement Calculate the [H3O+] concentration (in M) in a 0.1 M aqueous solution of NH3. [Kb = 1.8 x 10–5 ] (a) 7.5 x 10–12 M (c) 1.8 x 10–6 M (b) 3.0 x 10–10 M (d) 1.3 x 10–3 M Homework Equations ΔTb = Kb x m The Attempt at a Solution So... I'm kind of at a loss here...

Homework Statement hey guys, I've got a prob, i kinda know how to do this question but i can't get past the first step. i want to write an equilbrium expression by I am not sure what the chemical reaction is. any help would be good Homework Equations A solution of a weak acid, HCOOH...

Homework Statement Predict the sign of ΔS(sys) for each of the following processes: a) Zn(s)+2HCl(aq)-->H2(g)+ZnCl2(aq) b) CH3CH2CH3(g)+5O2(g)-->3CO2(g)+4H2O(l) Also, I'm not sure but when we're evaluating questions like these, do we count the number of moles only of solids, aqueous and...

This isn't a homework question but a general question which I should know the answer to but am not sure. If you have a basic/acidic compound and add it to water to form an aqueous solution, the water should turn basic/acidic respectively, right? no exception? Thank you

Hi Everyone! Hopefully someone can help me out with this question...Why is aniline soluble in aqueous hydrochloric acid, but acetanilide is not? Is it because aniline has a lone pair on the nitrogen that is more available to react? The lone pairs in acetanilide are too tied up with...

Homework Statement The mass of potassium nitrate that could be recovered from a solution prepared at 60deg Celsius from 250g potassium nitrate and 250g water by cooling the solution to 10 deg Celsius. Homework Equations The Attempt at a Solution not to sure how to start this one...

Homework Statement Ammonia acts as a base in aqueous solution; Kb is equal to 1.8 x 10-5. What is the Ka for the ammonium ion NH4+ in aqueous solution? Homework Equations The Attempt at a Solution I am totally lost for this question, can someone please start me off? all i know...

Homework Statement How would you prepare 5.00 L if an aqueous solution having a pH = 10.70, if you had a supply of 0.250 M NaOH? Homework Equations I don't even know anymore... The Attempt at a Solution I've tried a million different ways but I never come up with the answer...

Which one has a greater concentration, 1 molar NaOH or 1 molal NaOH aqueous solution? for the answer Explain Why!

Homework Statement Classify each of these aqueous solutions as acidic, neutral, or basic. A. HI(aq) B. NaCl(aq) C. RbOH(aq) Homework Equations The Attempt at a Solution A. HI(aq) is acidic B. NaCl(aq) is neutral C. RbOH(aq) is basic Am I right, wrong?!

Homework Statement If Lovastatin were heated in dilute aqueous acid, what would the molecular weight of the product be? (The large of the two products. Assume that there is no hydration of the alkene functionalities.) Homework Equations N/A The Attempt at a Solution I drew...

Chem problem need help... Homework Statement How would you prepare the following aqueous solutions? (a) 1.10 kg of 0.0515 m ethanol (C2H5OH) from ethanol and water Add___ g C2H5OH to ____ g H2O. (b) 511 g of 15.0 mass % HCl from 35.3 mass % HCl Add___ g of 35.3% HCl to ___ g of water...