Question

Question: The Mr of sodium hydroxide is 40. How many grams of sodium hydroxide are there in:
b) 25 cm of a 0.5 M solution?

Answer 1

Answer:

Moles of Na = volume in liter x M

assuming u meant 25cm cube = 25ml = 0.025 l

moles = 0.0125

mass = moles x mm

= 0.0125x 40= 0.5g