Question

Determine the [oh] concentration in a 0.169 m ca(oh)2 solution. 0.338 m 0.169 m 5.92 x 10-14 m 2.96 x 10-14 m 0.298 m

Answer 1

Answer: 0.338
Explanation: 
Ca(OH)2 , also known as calcium hydroxide, is a strong base although it is not very soluble in water.
Therefore the concentration of 1 OH is equal to 0.169 m,
Since Ca(OH)2 contains two OH, therefore, concentration of O[OH] is given as:
[OH] = 2 x 0.169 = 0.338 m