Question

Calculate the molarity of a solution made by dissolving 12.5 g Na2CO3 in exactly enough
water to form 550.0 mL of solution.

Answer 1

Answer:

0.215 M

Explanation:

M = m/L

To find to moles of Na2CO3 we have an equation:

m = mass(g)/molar mass(g/mol)

Molar mass of Na2CO3 is 106

=>> 12.5g/106 = 0.118 moles

To convert ml to L, divided ml by 1000

550/1000= 0.55L

Apply this equation to find the molarity: M = m/L

0.118 ÷ 0.55 = 0.215M