Question

734 g of Li2SO4 is dissolved in a 2510 mL solution. What is the concentration of the solution? Report your answer with the correct number of significant figures.

Answer 1

Answer: 2.66 M

Explanation:

The molecular mass of Li2SO4 is 109.94 g/mol

Calculate moles:

734 g109.94 g/mol=6.68 mol

Calculate molarity:

M= 6.68 mol / 2.51 L

= 2.66 M

Answer 2

Concentration = 3.105 mol/L

Step-by-step explanation:

To determine the concentration of a solution it can be identified by means of the Molarity equation:

`M=(# mol)/(volume (L))`

Milliliters to liters are converted:

2510 mL = 2.150 L

`mol=(mass (g))/(MW)`

The molecular weight of Li2SO4 is determined for the calculation of moles:

`mol=(734g)/(109.94g/mol)=6.6764mol`

`M=(6.6764mol)/(2.15 L)=3.105 (mol)/(L)`