For questions relating to compounds dissolved in water and resulting reactions.

learn more… | top users | synonyms

7
votes
1answer
183 views

When I place a straw in carbontated drink and blow, more gas bubbles rise to the surface?

When I place a straw in carbontated drink and blow (making bubbling noises), more gas bubbles rise to the surface. The gas bubbles which rise to the surface are from the carbon gas dissolved in the ...
3
votes
0answers
34 views

What would happen if I mix salt and sugar in a cup of water? [duplicate]

If I mix water in a cup with sugar at some stage the solution will become saturated and no more sugar will dissolve into the water. If I now add salt to the solution will the salt dissolve into the ...
4
votes
1answer
41 views

Saturation of multiple solutes

Can a liquid which is saturated with a single solute, dissolve a different solute, or is saturation a universal thing? I ask because I've seen that different solutes have different points (amounts) at ...
3
votes
1answer
41 views

Buffer calculation

Problem: A buffer was made by mixing 500 mL of 1 M (mol/L) acetic acid and 500 mL of 0.5 M calcium acetate. What are the resulting concentrations of acetic acid (henceforth called ...
2
votes
1answer
44 views

Buffer solution calculation

Preface: Buffer solution (acid-base buffer). I am provided with a weak base, which I will designate B. pKa for B's conjugate acid--which I will designate BH--is 8.1, and its mole weight (sic) is ...
1
vote
1answer
24 views

Cohesive Energy Density table request

Quick question: Any one knows a resource for Cohesive Energy Density of some organic materials ? I am not looking for any specific molecule, actually I want to plan my project based on available ...
2
votes
1answer
45 views

Balancing Redox Equations - Half Reactions

How do I balance this using the half-reaction method: $$\ce{Zn(s) + HCl(aq) -> Zn^{2+} (aq) + H_2 (g)}$$ I would first split it up in its ionic components: $\ce{Zn(s) + H^+ + Cl^- -> Zn^{2+} ...
0
votes
1answer
47 views

Effect of dilution on pH for HCl

Is it necessary to consider common ion effect when suppose a strong acid like HCl is added to water? For example in this question: 10 mL of $10^{-6 } \ce{mol/L \ HCl}$ solution is mixed with 90 mL of ...
1
vote
1answer
38 views

How to remove nitrate from water sample?

Are there any simple methods to completely remove nitrate ions from few ml of impure water sample ? One method I am curious about is the following process : Add one or more reagents to water in ...
-1
votes
1answer
42 views

Is an acid a liquid or an aqueous solution? [closed]

I am tying to determine if an acid is a liquid or aqueous solution? Please can some one enlighten me?
1
vote
2answers
40 views

Double Replacement Reactions form Precipitates

Why do most all double replacement reactions result in a precipitate and an aqueous molecule? Is it because the individual solute molecules always form stronger bonds such as how in single replacement ...
6
votes
1answer
68 views

'Emulating' calcium hydroxide

I posed this question at the Seasoned Advice SE and thought I might get some more information here. Traditionally prepared corn is cooked in a calcium hydroxide solution to make it more digestible, ...
0
votes
0answers
22 views

Strong and weak bases? [duplicate]

I have read that a strong base fully dissociates in aqueous solution to form hydroxide ions, and therefore that strong bases are alkalis. I was wondering if you can have a strong base that is not an ...
0
votes
2answers
32 views

Confused about strong/weak dibasic and tribasic acids?

I know that sulfuric acid is considered a strong acid, and the dissociation of its first H+ ion is complete and of its second H+ ion is partial. Phosphoric acid is weak and all three of its H+ ions ...
5
votes
2answers
81 views

Why do exam questions specify “dilute acid”?

All of the exams that I've sat so far, and the homework questions I've had, always ask for the reaction between a substance and a dilute acid. Is there a difference in the reaction between a dilute ...
2
votes
1answer
68 views

Weak base titrated with a strong acid

If you have a weak base XOH titrated with a strong monotonic acid, where do you start with that? Would you first have the base react with water and break up and determine how much of it does? Or just ...
1
vote
1answer
26 views

Changing solubility of metal complex by adding ethanol

After creating a solution of copper(II)-sulfate-pentahydrate, water and concentrated ammonia, the newly formed complex (tetraamminecopper(II)-sulfate-monohydrate) is completely dissolved in water. By ...
2
votes
2answers
62 views

What is the maximum molarity of aqueous HCl?

Here is a problem a made up: We have some aqueous $HCl$. What is the maximum possible molarity of the HCl? How do I solve this? I don't have any good ideas.
1
vote
1answer
35 views

Solid AgCl placed in 1 L of 0.55 M NaCl - find mass AgCl dissolved

A problem in my textbook: Solid $\ce{AgCl}$ is placed in $1\,\mathrm{L}$ of $0.55\,\mathrm{M}$ $\ce{NaCl}$. Find the mass of $\ce{AgCl}$ which dissolves. I know the method to solve the problem. ...
0
votes
0answers
26 views

PVP-10 Stock Solutions

Hye everyone, First of all, I would like to apologize, if my question is quite dummy to you. I really don't know how to do it. Hopefully, anyone here can help me. I need to prepare PVP-10 stock ...
0
votes
1answer
33 views

Ionic equilibrium equation [closed]

What form is the ionic equalibrium equation? I have problem asking for it, but I'be done so many different equalibrium equations that I'm starting to get mixed up on which one is called what... Which ...
0
votes
1answer
26 views

Ionize Hydrogen and Oxygen Gas in Electrolytic Cell?

As is well known, water can be electrolyzed into oxygen and hydrogen gasses. However, all redox reactions can be run in reverse. If I were to electrolyze water in 2 closed containers (in order to trap ...
3
votes
2answers
45 views

Diluting down solutions method

I'm designing an experiment and it involves testing various concentrations of solutions, and I will be testing 5 in total. I proposed to make up a stock solution, and distribute it evenly in 5 ...
2
votes
5answers
371 views

What gas is released during dissolving NaOH

What gas is released during dissolving solid $\ce{NaOH}$ in a high purity water? Water more than 10 M$\Omega$/cm and standard quality $\ce{NaOH}$.
0
votes
1answer
72 views

How do you find the pH of a solution from a density and weight percentage?

An $\ce{HCl}$ solution of density $\mathrm{1.19~g~ml^{-1}}$ has weight percentage of 38%. Find it's pH. Since there is no given volume I assume there is no way to solve this?
1
vote
0answers
24 views

A chemical that would react with sodium polyacrylate? [closed]

If clothing contained sodium polyacrylate, what chemical could be introduced to dissolved the clothing? If possible, not to be affected if water is present as well.
1
vote
0answers
48 views

Calculating the Molarity of an Ion?

I'm completely stuck on this one - I was doing an experiment in a lab and now I cannot find the molarity of an ion in a solution. I've looked everywhere on the web but after 2 hours of searching I ...
3
votes
1answer
60 views

Carbonic acid-hydrogencarbonate buffer system pH calculation?

I am learning about the pH of buffer solutions, and am slightly confused by my text book's calculation. For the blood's buffer system of carbonic acid and hydrogencarbonate ions as the conjugate case, ...
0
votes
1answer
24 views

Is sodium hypochlorite solution an ionic solution - does it conduct current?

Does an aqueous solution of sodium hypochlorite conduct current?
0
votes
0answers
9 views

What is the heat of dissolution of sodium acetate trihydate?

Is the reaction endothermic since its crystallization is exothermic?
4
votes
1answer
30 views

Boiling aluminum in high-alkalinity water

This question ultimately relates to brewing beer, but more specifically to water treatment before brewing. Though I can't get a water quality report, I suspect I have high levels of bicarbonate ...
1
vote
0answers
26 views

Weighted Drilling Fluid Comparison with CaCl₂

I asked a question previously, and the answer was quite illuminating. The answer ushered me forth in a direction that finally made sense. I ended up finding this website, ...
0
votes
0answers
63 views

How to measure the enthalpy change of hydration?

I am learning about lattice enthalpies, and my text book talks about determining the lattice enthalpy from the standard enthalpy change of solution and the enthalpy change of hydration of the ions, ...
2
votes
1answer
38 views

Why don't water molecules react alongside aqueous reactions?

To explain my question I'll use an example: We all know that sodium displaces copper in a solution of its sulfate in the reaction: $$\ce{2Na (s) + CuSO4 (aq) \rightarrow Na2SO4 (aq) + Cu (s)}$$ My ...
2
votes
2answers
111 views

Methylene blue used as funguscide in cichlid reproduction - concentration measurement?

I have an aqueous solution of methylene blue. How do I determine the concentration of this solution, so I can duplicate it?
2
votes
1answer
36 views

How to convert sodium aluminate back to sodium hydroxide?

I had dissolved a bunch of aluminium foil in an aqeous solution of sodium hydroxide. The resulting solution consists mainly of sodium aluminate with very little excess sodium hydroxide. What I want to ...
3
votes
2answers
108 views

Can artificial sea water be prepared by mixing sea salt with water?

I am looking for ways to easily prepare artificial sea water. The chemical composition doesn't have to exactly match that of natural sea water. On-line I can find recipes to prepare sea water. But I ...
3
votes
2answers
63 views

What is hard and soft water and how does the process of dissolution work?

This is a very basic question about solubility, especially solution of table salt in water and solution of sugar in water. I have heard about terms like hard water, soft water, filtering of water to ...
1
vote
1answer
51 views

Why does the potential difference of a current drop, when silver nitrate is added to deionised water?

Semi-related to Why do some salt ions in solution conduct electricity better than others? After conducting more experiments, using deionised water as an analyte only, I found the potential difference ...
5
votes
2answers
118 views

Are All Solutions of Weak Acid/Bases Buffers?

I am having a difficult time understanding what makes a buffer a buffer. Buffers in my textbook are defined as a solution of a weak acid or base and their conjugate acid/base. So if I were to just ...
1
vote
2answers
107 views

Are Na and Cl ions from NaCl in water separate charged particles?

Suppose I pour some sodium chlorine into water. So, what happens is that NaCl(s) → Na+(aq) + Cl-(aq) meaning that the ionic bond between Na and Cl breaks up (correct this far?) Now, does this mean ...
3
votes
1answer
49 views

How to make 0.3% ammonia water from 28-30% ammonia hydroxide

Can someone tell me how to make 0.3% ammonia water from 28-30% Ammonia hydroxide? I am trying to make a gallon or 3.78 Liters.
1
vote
1answer
77 views

Gold salt solution?

I was wondering what salts of gold are soluble and which are insoluble. From what I understand, silver is soluble as silver nitrate but insoluble as most other common salts like chlorides and ...
0
votes
1answer
56 views

Effect of a solute on the boiling point of the solution

I have a question regarding the boiling point. If we have two different aqueous solutions, let's say one with glucose and the other with ethanol; and, Both solutions have same molarity 1M. Do they ...
4
votes
1answer
32 views

How do I make a dysprosium chloride solution from dysprosium oxide?

I know that dysprosium oxide is insoluble in water. I was told that I need to add concentrated $\ce{HCl}$ to the compound and then evaporate the $\ce{HCl}$ off. From looking at the reaction equation, ...
2
votes
0answers
22 views

Preparing CdSe electrodeposition bath

What is the best way of preparing an aqueous solution containing 5 mM $\ce{CdSO4}$, 1 mM $\ce{SeO2}$, 0.5 M $\ce{Na2SO4}$ and adjusting pH to 3 by adding 0.5 M $\ce{H2SO4}$? What is the ...
2
votes
2answers
160 views

What are the effects of adding water to a system at equilibrium?

Given the reaction $\ce{NaCl~(s) <=> Na+~(aq) + Cl^{-}~(aq)}$. $\ce{NaCl}$ is added to water and equilibrium is reached. Does the reaction shift to the left/right/not shift at all if more ...
7
votes
1answer
157 views

What is the white substance left behind after boiling down water

I was boiling down water in a stainless steel pot as an experiment the other day. When the water was completely vaporised, a white substance was left behind on the bottom of the pot. I tried rubbing ...
1
vote
1answer
62 views

concentration of magnesium chloride solution in an experiment? [on hold]

I want to make a solution with 30% concentration of Magnesium Chloride and I need a total of $72~ \text{kg}$ of solution. the magnesium chloride is not pure, the composition of it is ...
0
votes
1answer
63 views

Dissociation of different compounds?

What would be the dissociation of Hydrosulfuric acid in the presence of water? I was thinking that Hydrosulfuric acid or $\ce{H2S}_{(aq)}$ would form $\ce{2 H+}$ and Sulfur ions. With this logic, I ...