helpme
A really tough bot, or a member.
Joined: 14 May 2005
Posts: 2
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 Posted: Sun May 15, 2005 10:31 pm Post subject: how did they get this Answer? |
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hey ppl... 
heres something/
A titration was carried out using an 0.10 moldm-3 solution of an unknown acid, HxA to determine the value of ‘x’ in the acid formula. 25 cm3 of 0.15 moldm-3 sodium hydrogen carbonate solution was found to require an average titre of 12.35 cm3 of acid to just neutralise it. What is the value of x?
Well, the answer is this:
1. Amount of sodium hydrogen carbonate = 3.75 x 10-3 mol,
ratio is 1:1, so amount H+ = 3.75 x 10-3 mol
H+ is 0.3 moldm-3, so x=3
but how did they get that???
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