A sample of 76 g of NaCl is dissolved to make 1 L of solution. What is the molarity of the solution? Show your work.

Question

asked Oct 14, 2020 3.3k views

1 Answer

Hetsch · Answer 1 · 2020-10-20T23:10:55+0000

Answer:

1.3005 M

Step-by-step explanation:

Given that,

Mass of NaCl =
$76 \ g$

Molar mass of NaCl=
$22.99+35.45=58.44\ g/mol$

The formula for calculation of moles,

Moles,

$n=(given \ mass)/(molar\ mass)\\n=(76)/(58.44) \ g/mol\\n=1.3005\ g/mol$

Given that volume
$=1\ ltr$

Molarity,

$=(moles\ of\ solute)/(litre\ of\ solution) \\=(1.3005)/(1)\\ =1.3005\ M$

Therefore the molarity is 1.3005 M.