Question

Using stoichiometry, determine the mass of powdered drink mix needed to make a 1.0 M solution of 100 mL. Use molarity = moles of solute(mol)/liters solution(L)  to find the moles of drink mix, then convert moles to grams using mole conversion.

Answer 1

Answer:

$34.2\text{ g}$

Explanation:

We want to get the mass of the powdered drink

Mathematically:

$mass\text{ = no of moles }\times\text{ molar mass}$

To get the number of moles, we multiply the molarity and the volume

We have the molarity as 1 M

The volume in L would be (100/1000 = 0.1 L)

We have the number of moles as:

$1\text{ }\times\text{ 0.1 = 0.1 mole}$

To get the mass, we need the molar mass

The molar mass of sucrose is 342g/mol

Thus, we have the mass as:

$0.1\text{ mol }\times\text{ 342 g/mol = 34.2 g}$