Skip to main content

All Questions

2 votes
3 answers
6k views

How can magnesium hydroxide be a strong base and be sparingly soluble at the same time?

A strong base means it completely dissociates forming $\ce{OH^-}$ ions when added to aqueous solution. Sparingly soluble means it dissolves very little when added to aqueous solution. Yet magnesium ...
Nick_2440's user avatar
  • 253
-1 votes
1 answer
385 views

Difference between neutral and amphoteric oxides

What is actual difference between neutral oxides (e.g. $\ce{NO},$ $\ce{N2O},$ $\ce{CO})$ and amphoteric oxides (e.g. $\ce{Al2O3})?$ I got a hint of it from the comment of Ivan Neretin.
Harsh jain's user avatar
  • 1,693
1 vote
1 answer
229 views

Neutral anions in salts and strong acids are similar - is it a coincidence? [closed]

Recently I was studying salts and my professor provided a list of anions which are considered neutral in salts (that is, they do not change the $\mathrm{pH}$ of an aqueous solution when added as a ...
kiler129's user avatar
  • 171
13 votes
2 answers
26k views

Why is carbon dioxide considered a Lewis acid?

$\ce{CO2}$ is considered a Lewis acid. How it is an acid? According to Lewis: “species that accept an electron pair are acids”. But $\ce{CO2}$ can't accept electron pairs because oxygen and carbon ...
user40151's user avatar
  • 151
2 votes
2 answers
20k views

Why is phosphorous acid more acidic than phosphoric acid?

Phosphoric acid has basicity of 3 i.e it can loose 3 $\ce{H+}$ while phosphorous acid has basicity of 2. Why is phosphorous acid more acidic than phosphoric acid? Acidity refers to the ability to ...
user avatar
0 votes
1 answer
3k views

Is Fe(OH)3 a salt or an alkali?

I know that a neutralization reaction (i.e. a reaction between an acid and a base) results in the formation of a salt and water, but when I came to know that $\ce{Fe(OH)3}$ is salt, I began to have ...
Kevin's user avatar
  • 103
1 vote
2 answers
1k views

Defining an acid-base reaction from the perspective of the Arrhenius theory of acids and bases

$$\ce{NH3 + HCl -> NH4Cl}$$ The above equation is the reaction of ammonia with hydrochloric acid (all substances are aqueous). I understand that ammonia counts as a base because it can react with ...
Mathematician's user avatar