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Chem 4 AQA acids and bases exam question

Engineerrookie

I understand the first question is 2/3 n due to equilibrium moles, but I cannot figure out the second question?

Reply 1

username986184

Original post by Engineerrookie

I understand the first question is 2/3 n due to equilibrium moles, but I cannot figure out the second question?

2/3 divided by 1/3

2:1

Reply 2

Engineerrookie

But what's the reasoning behind that??

Reply 3

username986184

Original post by Engineerrookie

But what's the reasoning behind that??

If you have n of HX and neutralise 1/3 you have 2/3 n HX. This means you have 1/3 n NaX.

Plug directly into concentration. Volume cancels, n cancels so all you are left with is

2/3 divided by 1/3

Reply 4

Engineerrookie

Original post by TeachChemistry

If you have n of HX and neutralise 1/3 you have 2/3 n HX. This means you have 1/3 n NaX.

Plug directly into concentration. Volume cancels, n cancels so all you are left with is

2/3 divided by 1/3

Thank you