I have been set this question:
MHSO4 (where M stands for either Na or K) is a crystalline solid that dissolves in water giving a solution containing M+, HSO4-, H+ and SO42- ions.
Describe a chemical test (apart from indicators) by which you could demonstrate that an aqueous solution of MHSO4 is acidic.
So far I got that 1 test could be to test for CO2 by bubbling it through limewater (i.e. CO2 turns limewater milky in appearance), and I have this equation involving for that reaction:
CO2 (g) + Ca(OH)2 (aq) ---- CaCO3 (s) + H2O(l)
and the ionic half equation for testing for CO2 involving the H+ ions from the acid salt is:
2H+ (aq) + CO3- (s) ----H2O (l) + CO2 (g)
BUT I DON'T UNDERSTAND WHERE YOU SAY THE CARBON COMES INTO IT ALL? IS IT JUST FROM THE ATMOSPHERE? I AM CONFUSED ABOUT HOW TO WRITE THE EQUATION SAYING IS MHSO4 IS DISSOLVED IN WATER IT PRODUCES M+, HSO4-, H+ AND SO4(2-) IONS AND THEN INCORPORATING THE WHOLE C02 THING!
IM GETTING TOTALLY CONFUSED!