Question

What mass of NaOH (M = 40 g/mol) should be dissolved in 125 mL of water to form a 0.65 M solution?

Answer 1

Answer:

3.25g

Explanation:

molarity=no of moles /volume in ltr

here no of moles=given mass/molar mass  ie: x/m

0.65=(x×1000)/(40×125)

x= 3.25g

Answer 2

Answer:

3.25 g

Explanation:

Molarity = no. of moles divide by vol in litre

= g ( unknown mass of NaOH) / 40 divided by 125/1000

.65 = g/40× 1000/125

.65×40×125/1000 =g

3.25=g