Question

What are the concentration of a solution containing 1.40g of potassium hydroxide per 250cm

Answer 1

ANSWER: 0.0001

Explanation:

concentration= no.of moles/volume

weight of given KOH = 1.40 g

molar mass of KOH = 56 U

i.e. n= 1.4/56 = 0.025

volume= 250 cm^3. [1cm^3=1ml]

concentration= 0.025/250

=0.0001 ( answer.)

[NOTE: volume Exists in m^3 or cm^3]