7.5 g of CaCl2 in 65.0 g of CaCl2 solution
Express your answer using two significant figures.
7.5/65.0 = ?
To express the answer using two significant figures, we need to consider the given 7.5 g and 65.0 g and round our final answer accordingly.
To find the concentration of CaCl2 in the solution, we divide the mass of the solute (CaCl2) by the mass of the solution.
Concentration = Mass of solute / Mass of solution
In this case, the mass of the solute CaCl2 is given as 7.5 g, and the mass of the solution (which includes both the solute and the solvent) is given as 65.0 g.
Concentration = 7.5 g / 65.0 g
Calculating this gives us:
Concentration = 0.115384615 g/g
To express this answer using two significant figures, we round the number to two significant figures:
Concentration ≈ 0.12 g/g
So, the concentration of CaCl2 in the CaCl2 solution is approximately 0.12 g/g.