Question

Calculate the Molarity of 10./.(w/w) of NaoH of density 1.20gram/ml

Answer 1

mass of naoh = 10

mass of solution =100

mass of h2o= 90

density = 1.2

density = mass of solution / volume

1.2 = 100 / volume

volume = 100/ 1.2

moles = 10 /39

=0.26

molarity = moles of naoh ×1000/ volume

= 0.26 ×1000(100/1.2)

=2.6 ×1.2

=3.12 M/mol