Question

1.5 L solution of NaCL has a molarity of 2.5. How many grams of NaCL must be added to increase the concentration to 3.1 M?

Answer 1

data given

volume 1.5l

molarity2.5

Required mass to be added

Step-by-step explanation:

from

molarity =mass/molar mass ×volume

3.1=m/58.5×1.5

m=272g

also,

2.5=m/58.5×1.5

m=219.38

now,

mass increased =272-219.38

m=52.62

: . mass increased is 52 62g