Determine whether each substance listed is a strong acid, weak acid, strong base, weak base, acid salt, basic salt, or neutral salt. a) sodium hydroxide, NaOH b) ammonium chloride, NH4Cl c) perchloric acid, HClO4 g

a) Strong Base

b) Acid Salt

c) Strong Acid

Explanation:

As is the case with most hydroxides, NaOH is a strong base. It dissociates completely into Na⁺ and OH⁻ species when in water.

NH₄Cl is a acid salt, as it produces H⁺ species when dissolved in water:

HClO₄ is a strong acid, as it completely dissociates into H⁺ and ClO₄⁻ species when in water.

a

explanation:

a. the law of proportion states the combination of 2 atoms in a specific ratio to produce multiple compounds such as the given statement of question ‘1st compound contains 88.8 % cu ’ indicates 88.8 g of cu is present along with 11.2 g oxygen in 100 g of compound whereas the statement ‘2st compound contains 79.9 % cu ’ indicates 79.9 g of cu is present along with 20.1 g oxygen in 100 g of compound

1st compound contains 88.8 g cu

for cu

m = 63 g /mol

atomic % = 88.8 /63 = 1.42

for o

m = 16 g /mol

atomic % = 11.2 /16 = 0.7

b. the emperical formula of 1st compound is

cu1.4o0.7

cu2o