Question

Which of the following compounds gives a solution of pH 7 when dissolved?
a) Potassium iodide
b) Sodium carbonate
c) Ammonium nitrate
d) Aluminum oxalate

Answer 1

its not C because NH4NO3 dissociates into NH4+ + NO3-, then in water, NH4+ +H2O=NH3 + H3O+ which is and acid

Answer 2

or B because that forms a base

Answer 3

you're good so far. Use the same logic to write dissociation equations for the other compounds and determine which one is not an acid nor a base.

Answer 4

im not sure how to do aluminum oxalate. is it Al2(c2o4)3. then in water, c2o4- + h2o = HC2o4 + OH-. if thats right then its a base, so the answer is A

Answer 5

yep, thats it.

Answer 6

good work, dude

Answer 7

thanks man!