All Questions
7
questions
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MgO as food supplement - solubility in water
A number of magnesium food / sports supplements contain it as MgO - which is practically unsoluble in water. The recommended quantity is somewhere around .3g / day, so not an insignificant amount.
How ...
- 1,220
0
votes
2
answers
3k
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Is an aqueous solution of potassium bicarbonate acidic or basic in nature?
The following is the definition of an acid salt according to my textbook:
The salts formed by the partial replacement of the replaceable hydrogen atoms (H+ ions) of an acid molecule by a metallic or ...
- 1
0
votes
3
answers
148
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Finding ions in water samples
So for a school chemistry assignment I was given 5 water samples and a bunch of different reagents to help me find out what was in the solutions. I'm stuck on two.
The first one had a pH of 7 and ...
- 11
2
votes
0
answers
1k
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How does increasing ionic strength affect the pH of solution?
I'm having trouble interpreting the data for an experiment. With increasing ionic strength, I found lower solubility but also lower pH of the solution. What is the effect of the ionic strength on the ...
1
vote
2
answers
2k
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When pH increases, does the effect of increased [OH-] or reduced [H+] control precipitation of CaC2O4
The image below shows how oxalic acid dissociates and forms calcium oxalate ($\ce{CaC2O4}$ or $\ce{Ca(OOC-COO) as written below}$).
When the pH increases, does this result in more or less $\ce{Ca(OOC-...
- 2,853
4
votes
2
answers
23k
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Caffeine dissolution
I am looking to add caffeine powder in pure form to water that has a pH level of 7 or higher. What would the pH level be if I do this? Is Caffeine itself acidic?
- 51
0
votes
1
answer
170
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Purification of water with ferric chloride
Ferric chloride ($\ce{FeCl3}$) is a chemical used in water treatment. If ferric chloride is added to a water sample containing calcium bicarbonate, would the $\mathrm{pH}$ of the solution decrease or ...
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