Question

A chemist adds of a aluminum chloride solution to a flask. Calculate the mass in grams of aluminum chloride the chemist has added to the flask. Be sure your answer has the correct number of significant digits.

Answer 1

The given question is incomplete. The complete question is:

A chemist adds 95.0 ml of a 1.5M aluminum chloride solution to a flask. Calculate the mass in grams of aluminum chloride the chemist has added to the flask. Be sure your answer has the correct number of significant digits.

Answer:  19.0 grams

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.

$Molarity=\frac{n\times 1000}{V_s}$

where,

n = moles of solute

$V_s$ = volume of solution in ml

moles of $AlCl_3$ = $\frac{\text {given mass}}{\text {Molar mass}}=\frac{xg}{133.34g/mol}$

Now put all the given values in the formula of molarity, we get

$1.5=\frac{x\times 1000}{95.0\times 133.34}$

$x=19.0g$

Therefore, the mass in grams of aluminum chloride the chemist has added to the flask is 19.0