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Urgent help chemistry

Urgent help chemistry

Alevelhelp.1

Help!!!
I don’t get why, my answer which I annotated with working out is incorrect why’d they multiply by 10^-2 ????

(edited 10 months ago)

Reply 1

Teribblestudent

Original post by Alevelhelp.1

Help!!!
I don’t get why, my answer which I annotated with working out is incorrect why’d they multiply by 10^-2 ????

Hydrogen ion concentration is less at pH 3 than it is at pH 1

Reply 2

JoshGY

If Ph is 3 then you do 10 to the power of -3 to calculate H+ conc. This is 100 times Lower than the H+ conc at Ph 1 (0.1 at Ph 1 and 0.001 at Ph 3). Therefore you DIVIDE rate by 100 as H+ concentration is decreasing from Ph1 to Ph3, giving the answer shown

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