Chemistry Fun: Concentration Calculation Excitement!

What was the original concentration of the HCl solution?

The original concentration of the HCl solution is 0.04 M.

Have you ever wondered how to calculate the original concentration of a solution in a chemical reaction? Let's dive into the world of chemistry calculations and find out!

In the given scenario, a 150 mL sample of hydrochloric acid (HCl) reacted with 60.0 mL of a 0.100 M NaOH solution. The balanced chemical reaction is expressed as: HCl + NaOH -> NaCl + H2O.

To determine the original concentration of the HCl solution, we utilize the information provided. By using the amount and concentration of the sodium hydroxide reactant, we can perform the necessary calculations.

0.100 mol NaOH/L solution (0.06 L solution) x (1 mol HCl / 1 mol NaOH) = 0.006 mol HCl

Molarity = amount in moles / Volume of solution = 0.006 mol HCl / 0.150 L = 0.04 M

Therefore, the original concentration of the HCl solution is 0.04 M.

Now, you might be curious, what is molality in chemistry? Molality is the measure of the moles of any solute in a solution per unit kg of the solvent.

So, next time you encounter a chemical reaction puzzle, you'll be equipped to solve it with confidence!