Question

2.Calculate equivalent mass for the following compounds

aCalkcium Hydroxide

b) Aluminium Hydroxide

cJPotassium permanganate

d) Hydrochlorik acid​

Answer 1

Answer:

a) The equivalent weight of calcium hydroxide is 1/2 he mass of a mol of calcium hydroxide. 1 mol Ca(OH)2 =

74 grams Ca(OH)2 ; 1 equivalent Ca(OH)2 = 37 grams Ca(OH)2..

Explanation:

b) The atomic number of aluminium is 26.98, the atomic number of oxygen is 15.99 and atomic weight of hydrogen is 1. The molecular mass of aluminium hydroxide is calculated as shown below. Thus, the molecular mass of aluminium hydroxide is 78.003 g/mol.

c) ...

d) To convert volume to mass, we need the density of the solution. The specific gravity (density relative to the density of water) of hydrochloric acid solution is 1.18 g/mL. If 13.7 mL of hydrochloric acid solution is taken, then [13.7 mL x (1.18 g/mL) = 16.2 g is the mass of the hydrochloric acid solution.

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