Ionic Definition and 280 Threads

Homework Statement In its resting state, the membrane surrounding a neuron is permeable to potassium ions but not permeable to sodium ions. Thus, positive K ions can flow through the membrane in an attempt to equalize K concentration, but Na ions cannot. This leads to an excess of Na ions...

Homework Statement Current passes through a solution of sodium chloride. In 1.00 second, 2.68 x 10^16 Na+ ions arrive at the negative electrode and 3.92 x 10^16 Cl- ions arrive at the positive electrode. What is the current passing between the electrodes? Express your answer in...

Current...please help! Homework Statement In an ionic solution, 3.93×10^15 positive ions with charge +2e pass to the right each second while 9.01×101^5 negative ions with charge -e pass to the left. What is the magnitude of current in the solution? Homework Equations I = Ch in Q /...

or are they 1/8 of a sphere at the corners and 1/4 of a sphere at the edge?

Calculate the ionic strength of Ca2+ in a 0.01M CaCO3 solution. equation to use is: u=0.5 sum(Mi)(zi)^2 where M is the concentration and z is the charge of the species my question is when I am calculating the ionic strength of Ca2+, do I have to include CO3^2- that is in that...

1.Chlorine gas is bubbled through an aqueous solution of sodium iodide. 2.Barium hydroxide is used to neutralize sulfuric acid. Ba(OH)2(aq) + H2SO4(aq) -> BaSO4(s) + H2O(aq) ­ Ba(aq) + 2OH(aq) + SO4(aq) -> BaSO4(s) + O(aq) 1.The reason I am having trouble with this equation is...

i am doing revision for my exams aand was wondering which one of these, high temperature, hydrolysis or pH change would break the ionic bond between amino acids. I would go for pH change. I have no reason, it's just instinctively.

which pair of elements is most apt to form an ionic compound with each other? nitrogen and hydrogen or barium and bromine? please explain

elect "True" or "False" to indicate whether or not the stated reaction (or "no reaction") correctly corresponds to the expected observation in each case. Sodium bromide and hydrochloric acid; Na+(aq) + Cl-(aq) --> NaCl(s) Copper(II) sulfate and ammonium carbonate; Cu2+(aq) + CO32-(aq)...

Ionic Strength...help I am taking Biochemistry. However, the prof talked about Inoic Strength in class. This is the example, u = 1/2 (Molarity) (ionic charge )^2 Example... .10M CaCl2 u = 1/2 (.10)(+2)^2 + (.20)(-1) ^2 u = 1/2 ( .40 + .20 ) = .30 I opened my Chemistry...

Homework Statement I just made a thread on this but i did not understand the answer so I am asking for a simpler definition. How do I get from Na+¹ + O-² to Na2O?? Homework Equations The Attempt at a Solution no idea

Homework Statement How do i combine 2 different ions to make an ionic compound Homework Equations Na+¹ + O-² ---> The Attempt at a Solution I have no idea what to do plus I am new to this forum. Please try to help me in the simplest way possible because my teacher has failed...

Homework Statement "Write the net ionic equation for the reaction between HBr(aq) and NH_3(aq)" Homework Equations The Attempt at a Solution H^+(aq) + Br^+(aq) + NH_4^+(aq) + OH^-(aq) --> NH_4Br(aq) + H_2O(l) [edit] It's an online application that is a bit finicky, and I was...

i'm studying for my apchem exam. and rightnow; I'm currently reviewing my net ionic equations. but there's something I'm confused about in my ap chem book. Homework Statement the equation is: CaF2 (aq) + 2HCl (aq) ---> 2HF (aq) + CaCl2 (aq) and then the book says that the ionic equation...

:smile: i need a literature, Continuous, ionic liquid-catalysed propylation of toluene in a liquid-liquid biphasic reaction mode using a loop reactor concept. Advanced Synthesis & Catalysis (2007), 349(4+5), 719-726.i

Im reading about covalent bonds and I read that Molecular or true formula can fully identify ionic bonding compouds but not covalent ones because they cannot identify isomers. Does that mean the only kind of compouds that can have isomers are covalently bonded compounds?

Homework Statement Aqueous solutions of barium chloride and sodium fluoride are mixed to form a precipitate of barium fluoride. Homework Equations i'm not sure but i put. BaCl + NaF = BaF2 + NaCl2 The Attempt at a Solution I'm pretty much confused whether you balance the...

Homework Statement solid ammonium dichromate will produce (when heated) solid chromium (IV) oxide, nitrogen gas, and water vapor. Write the balance equation and net ionic equation. Homework Equations First i wrote: (NH4)2Cr207 (s) --> CrO2 (s) + N2 (g) + H2O (g) The Attempt at...

From what I gather both ionic and covalent bonds transform all the elements involved into ions. Does that mean every chemical compound that exists consists of ions and not atoms or are there chemical compounds that are made of pure unionized atoms? Also when they speak of ionized water what...

Homework Statement That's the problem statement (above). I basically need help knowing which fields to cover while talking about said topic in a 5-minute oral presentation. Pretty much, what I need to talk about (specifically). Homework Equations None. The Attempt at a Solution...

Hi I have a question involving periodic trends. This time the trend is on ionic radius. I'm not sure I got this right so I was wondering if anyone here may please offer their advice. Thank you! Question: Order each of the following ions according to largest to smallest. A. Cl^- B...

Net Ionic Equations! Please help me out! i'm having a hard time with writing net inoic equations and here are some sample problems with the answers I came up with. Please look over them and if somethings wrong, please correct the errors teach me how to fix it. 1. A strip of copper is...

Net Ionic Equations! Please help me out! i'm having a hard time with writing net inoic equations and here are some sample problems with the answers I came up with. Please look over them and if somethings wrong, please correct the errors teach me how to fix it. 1. A strip of copper is...

I obtained a net ionic equn' as follows Ba +2 (aq) + SO4 2- (aq) ----> BaSO4 (s) Now I need clarification for the following question and my answer to it. What is the max amount of solid product that could be obtained by reacting one mole of each reactant? I believe that b/c of the...

I was wondering if these net ionic equations were right? HCl + NH3 ---> NH4Cl + H2O Net Ionic is? 3H + NH3 ---> NH4 +H2O HCl + NaOH ---> NaCl + H2O Net Ionic is? H + OH ---> H2O NH4Cl + NaOH ---> NH3 + NaCl + H2O Net Ionic is? NH4 + OH ---> NH3 + H2O Are these Net...

Hi, I completed a Grade 12 experiment and now I am doing some calculations about it but I am confused. Here is the question: "Write the net ionic equation for each reaction, and note the value of ΔH for each reaction. e.g. H+(aq) + OH-(aq) --> H2O(l) ΔH = -45 kJ/mol HaOH I had three...

Ok here is the problem: 2NaI (aq) + Cl2 (g) ----- 2NaCl (aq) + I2 (s) For the net ionic I got: 2I- (aq) + Cl2 (g) ------- 2Cl- (aq) + I2 (s) Is this correct? Most chlorides and iodides are soluble, but one states (g) and the other states (s) so does that mean they are not...

I have obtained the following in a lab: Ba(OH)2(aq) + CO2(g) -- BaCO3(s) + H2O(l) First thing is this reaction correct? Second is their a net ionic equation since the product side has no soluble solutions?

I am having a review test soon and I was not taught anything about ionic stuff last year, I have no idea what it is at all. Sample questions look like: "which of the following compounds are considered to be ionic solids? If it is an ioni solid, write an equation showing the dissociation of...

My chem teacher is having trouble explaining the a particular happening in a fuel cell to the class. In a galvanic cell +ve ions move towards the +ve electrode and -ve to the -ve. In electrolytic cells the +ve ions move towards the -ve electrode and -ve to the +ve. He says that the reason why it...

This should be easy but I feel there is something I am mission I need to write the net ionic equations and then add #1 & #2 and compare to #3. Equation #1 - write net ionic equation for dissolution of solid NaOH in water Equation: NaOH (s) + H2O --> Na+ (aq) + OH- (aq) + H2O (l) Net...

Problem: When a solution of sodium hydroxide is added to a solution of ammonium carbonate, and the solution is heated, ammonia gas, (NH3) is released. Write a net ionic equation for this reaction. Hint: both NaOH and (NH4)2CO3 exist as dissociated ions in aqueous solution. Can someone help me...

When doing reactions of acid and metal compound, How do you know whether (one water and carbondioxide) or one carbonic acid will be formed? Since they have the same number of elements in the same proportion.

When a cation and anion combine to form an ionic compound, the cation is usually written before the anion. I.e. NaCl But with some ionic compounds like sodium acetate, it is written with the anion acetate written first. i.e. CH3COONa Why like this?

A list of compounds and their formulae are given below. Select those compounds that are IONIC. (choose all that Apply) A.)sulfuric acid H2SO4 B.) glucose C6H12O6 C.) sodium ethanoate CH3COONa D.) magnesium Sulfate MgSO4 E.) Propyl ethanoate CH3COOC3H7 i've chosen C and D. am i...

Which properties concerning ionic compounds and covalent molecules are INCORRECT? pick 3 statements. A.) All ionic compounds are soluble in water. B.) All covalent molecules are INSOLUBLE in water. C.) Covalent molecules are usually soluble in organic solvents. D.) Covalent molecules have...

Alright, these were asked on the test I took today, and I was just seeing if I did them correctly. Write the net ionic equations for the following reactions (don't need to be balanced): 1. Solid potassium amine is added to distilled water. KNH2 + H2O ---> K+ + NH3 + OH- 2. Sulfur...

How do I determine or predict if a substance is molecular or ionic? PLEASE HELP! Thanks!

i need help with the following problem: rewrite the following unbalanced equation, changing it to a balanced net ionic equation. Mg (s) + HC2H3O2 (aq) --> Mg(C2H3O2)2 (aq) + H2 (g) thanks. francisco

having a little trouble writing net ionic equations: 1. the equation when you dissolve C02 (carbon dioxide) in water. I can't figure out the ions because is there such a thing as a C+4 ion? or do you use a carbonate ion? 2. the net ionic equation when ammonia gas reacts with oxygen gas...

0.05ml of NH3 is dissloved in a solution containing water followed by 0.27g of NH4Cl. If the Kb for NH4OH is 1.8 * 10^-5 find the pH value of the solution. I am finding it difficult to predict the reactions that are going to happen here. I know to calculate Kh or the constant of hydrolysis of...

Why is NO2 called nitrite? I'm going over this again and I'm still confused. Part 1: Cations Group 1A and 2A cations are given the name of the metal plus the word "ion." Example: Mg 2+ is called a "magnesium ion." Some metals form more than one kind of cation as we saw in the last...

So...how do you carry out an experiment to test if some unknowns are covalent (polar or non-polar) or ionic? Unknowns: C6H12O6 --NaCl --CH4N20 --C6H8O7 :confused:

I can't find the answers to these two questions...could someone help me? Describe the process when a polar solvent dissolves an ionic substance. Why would SO2 go down in solubility when temperature increases? And while I'm thinking of it...my brother brought home his science book and...

Classify each of the following as ionic or covalent. I did all but I am not really sure about this one. NH4NO3 I put covalent. Is this correct? Thanks

Indicate whether the following compounds are ionic or covalent? (NH4) 3 PO4 I put this one as covalent. Is this correct. Thanks a lot.

Write the correct chem formula, predict products, and write the molecular, total, and net ionic equations. 1) barium chlorate + lithium carbonate Ba(ClO3)2 (s) + Li2CO3 (aq) --> BaCO3 (s) + 2LiClO3 (aq) Ba(ClO3)2 (s) + 2Li(+) + CO3 (2-) --> BaCO3 + 2Li(+) + 2ClO3- Ba(ClO3)2 (s) + CO3...

I am supose to write the net ionic equation for Complete the right side of the following molecular equation (but do not enter). Then enter the net ionic equation. Assume all salts formed are soluble. Acid salts are possible. Use = instead of ==>. Do not use spaces or subscripts. You may use...

1. Calcium + Water yields calcuim hydroxide + hydrogen Need balanced and net ionic equation, I got Ca + 3/2H20 =Ca(OH)2 +H I can't figure out how to balance it further and I don't know how to get the net equation cause calcuim hydroxide is soluble which means it wouldn't be in the net...

I am doing a study guide for an upcoming test, and I would like to check to make sure my answers are correct. Write the net ionic equation: (assume all aqueuos) calcium chloride and sulfuric acid: I am not sure what would happen here when sulfuric acid reacts. Would it donate one...