Question

What is the molarity of an HCl solution if 28.6 ml of a 0.175 M NaOH solution is needed to titrate a 25.0 ml sample of the HCl solution?Group of answer choices0.200 M HCl solution25.0 M HCl solution0.175 M HCl solution0.400 M HCl solution

Answer 1

4.6 M HCI

Step-by-step explanation:

This is the correct answer. I hope this Helps :))))

Answer 2

0.200 M HCl solution

Explanation

Given:

Volume of NaOH, Vb = 28.6 mL

Molarity of NaOH, Cb = 0.175 M

Volume of HCl , Vₐ = 25.0 mL

What to find:

The molarity of the HCl solution, Cₐ.

Step-by-step solution:

Step 1: Write the balance chemical equation for the reaction

2NaOH + 2HCl ------> 2NaCl + H₂O

Step 2: To calculate the molarity of the HCl solution.

Using the formula below:

`\begin{gathered} (C_aV_a)/(n_a)=(C_bV_b)/(n_b) \\ \\ n_a=2,n_b=2,V_a=25.0,C_b=0.175,V_b=28.6 \\ \\ (C_a*25.0)/(2)=(0.175*28.6)/(2) \\ \\ C_a=(2*0.175*28.6)/(25.0*2)=(10.01)/(50.0) \\ \\ C_a=0.200\text{ }M\text{ }HCl\text{ }solution \end{gathered}`

The molarity of the HCl solution = 0.200 M.