# Questions tagged [aqueous-solution]

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

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### How much of Sodium dichloro-s-triazinetrione dihydrate should i use?

I am trying to determine how much Sodium dichloro-s-triazinetrione dihydrate powder I should add to water to create a dilution that can be injected into my water supply to react with the Hydrogen ...
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### pKa calculation problem

a known amount of pure acid is dissolved in a known amount of amphoteric solvent. Given that the volume of the titrant base needed from the starting point of color change to the end point is known, ...
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### How can I tell how these compounds will react in an aqueous solution? (basic, acidic or neutral)

I have the answers, I just don't understand how I'm able to identify how they'll react in a given solution (acidic, basic or neutral).. is there a clear giveaway in these type of problems? 2) Acid 3)...
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### Finding Ka of a monoprotic weak acid from pH and concentration of added sodium salt

A solution of $\pu{0.36 M}$ of the sodium salt of a generic monoprotic weak acid $\ce{HA}$ has a $\mathrm{pH}$ value of $8.782.$ $K_\mathrm{a} = ?$ Why doesn't the following formula work in this ...
32 views

### What causes the differences in price in home testing kits for lead in water? [closed]

The price differences between home testing kits to test tap-water for lead are huge. 20 dollar will either buy 1 test kit or 100 test strips. Both are intended to test drinking-water safety. What ...
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### Accurate method to calculate the pH of a salt from a weak acid and weak base

Can someone help me with this? The problem is as follows: Find the $\mathrm{pH}$ of $\pu{1M}$ solution of $\ce{NH4CN}$. Their respective hydrolysis constants are: $K_h = 5.6\times 10^{-10}$ ...
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### What might serve as an initial starting photocatalyst for this large water-splitting solar simulator?

Question: What might serve as an initial starting photocatalyst for this large water-splitting solar simulator? Surely there must have been some planned experiments! The Gizmodo article Insane Light ...
561 views