Identify the base in the following acid-base reaction. PbCO_3 + H_2SO_4_(aq) imp
ID: 1003649 • Letter: I
Question
Identify the base in the following acid-base reaction. PbCO_3 + H_2SO_4_(aq) implies PbSO_4(s) + CO_2(g) + H_2O(l) H_2O CO_2 H_2SO_4 SO_4^2- CO_3^2- When are an empirical formula and a molecular formula the same? When the mass percentages of all of the elements in the two formulas are the same When the mass of the empirical formula unit is equal to the molecular mass Never Always When the molecular mass is an integer multiple of formula unit mass In the following reaction, which element is oxidized? Cu + FeSO_4 implies Fe + CuSO_4 0 Fe Cu S None, this is not a redox reaction.Explanation / Answer
21. A base is a substance which can accept a proton hence the base carbonate ion .
answer is e
22. answer is b
as molecular formula = n X emperical formula
and n is is the ratio of molecular weight to that of emperical formula weight.
23. answer is C
Oxidised means the substance has under gone oxidation that is either it combines with oxygen or its oxidation number is increased. in the given reaction Cu is changing its oxidation state from 0 to +2 so oxidised where as Fe is changing from +2 to 0 so reduced.