It is required to obtain 0.01 mol of alkali according to the scheme Ca → Ca (OH) 2

It is required to obtain 0.01 mol of alkali according to the scheme Ca → Ca (OH) 2 Determine the mass of the metal required for this purpose.

Reaction scheme for the formation of calcium hydroxide from calcium:
Ca = Ca (OH) 2
Amount of calcium hydroxide substance:
v (Ca (OH) 2) = 0.01 (mol).
According to the reaction scheme, 1 mol of Ca (OH) 2 is formed from 1 mol of Ca, therefore:
v (Ca) = v (Ca (OH) 2) = 0.01 (mol).
Thus, the mass of calcium required for this reaction scheme is:
m (Ca) = v (Ca) * M (Ca) = 0.01 * 40 = 0.4 (g).
Answer: 0.4 g.