Question

Calculate the hydrogen ion concentration by dissolving 4.85 g of HCl into enough water to make 2.5 L of solution.

a) 1.94 x 10^(-3) M
b) 3.67 x 10^(-4) M
c) 4.82 x 10^(-3) M
d) 2.48 x 10^(-2) M

Answer 1

To calculate the hydrogen ion concentration, we need to use the concept of molarity. The molarity is calculated by dividing the number of moles of solute by the volume of the solution. In this case, the hydrogen ion concentration is 0.0532 M.

Step-by-step explanation:

To calculate the hydrogen ion concentration, we need to use the concept of molarity. Molarity is defined as the number of moles of solute per liter of solution. In this case, the solute is HCl and the volume of the solution is given as 2.5 L. First, we need to calculate the number of moles of HCl using its molar mass. The molar mass of HCl is 36.46 g/mol. So, the number of moles of HCl is (4.85 g) / (36.46 g/mol) = 0.133 mol. Next, we can calculate the molarity by dividing the number of moles by the volume of the solution. Molarity = (0.133 mol) / (2.5 L) = 0.0532 M. Therefore, the hydrogen ion concentration is 0.0532 M. The correct option is d) 2.48 x 10^(-2) M.