Question

Henderson Hasselbach Question :/

Answer 1

make 1dm^3 of buffer up using \[C _{2}H _{5}CO _{2}H\] and \[C _{2}H _{5}CO _{2}Na\].
The required pH of the solution is 5.17. If 0.5 moles of acid (C2H5CO2H) is used in making the buffer, how many moles of C2H5CO2Na are used?
Could you provide a step by step guide please, I tried to re arrange the equation but with no luck :/

Answer 2

pH=pKa +([A-]/[HA])

pH= 5.17
[HA]= 0.5 moles in 1 dm^3
pKa = look in your book, there are tables
[A-] is what you're trying to find

Answer 3

+ log([A-]/[HA]) ***