Question

Determine the mass of chloride (MW = 35.45 g/mol) in grams present in 100 mL of a 0.25 M solution of aqueous GaCl3 (gallium(III) chloride).

a) 0.885 g
b) 1.3375 g
c) 3.545 g
d) 8.845 g

Answer 1

The mass of chloride in grams present in 100 mL of a 0.25 M solution of GaCl3 (gallium(III) chloride) is 0.885 g.

Step-by-step explanation:

To determine the mass of chloride in grams present in 100 mL of a 0.25 M solution of GaCl3 (gallium(III) chloride), we need to first calculate the number of moles of GaCl3 present in the solution. The molarity of a solution is defined as the number of moles of solute per liter of solution. So, for a 0.25 M solution of GaCl3, the number of moles of GaCl3 can be calculated as:

0.25 mol/L x 0.100 L = 0.025 mol of GaCl3

Next, we can use the molar mass of chloride (35.45 g/mol) to convert the moles of GaCl3 to grams of chloride:

0.025 mol x 35.45 g/mol = 0.885 g