How many grams of KCl are present in 75.0 mL of 2.10 M KCI?
A)5.59
B)117
C)2.66
D)11.7
E)none of the above

Question

Quizplus · Accepted Answer

First, we need to find the number of moles of KCl:

mol KCl = M x V
mol KCl = 2.10 mol/L x 0.0750 L 
mol KCl = 0.1575 mol

Next, we can use the formula:

mass = moles x molar mass

The molar mass of KCl is 74.55 g/mol.

mass KCl = 0.1575 mol x 74.55 g/mol 
mass KCl = 11.7 g

Therefore, the answer is D) 11.7.

How Many Grams of KCl Are Present in 75