Ask Question
20 September, 03:25

What is the volume of a 0.5 mol/L NaOH solution required to completely react with 20 mL of a 2.0 mol/L HCl solution? What is the pH value of the produced solution? (Hint: Write and balance the chemical reaction between HCl and NaOH, and then use the stoichiometric relation (molar relation) between NaOH and HCl to calculate the minimum volume of NaOH solution.) Group of answer choices

+5
Answers (1)
  1. 20 September, 06:10
    0
    The volume of NaOH required is 80mL

    pH of the resulting solution is 7 since reaction produces a normal salt

    Explanation:

    First, we generate a balanced equation for the reaction as shown below:

    NaOH + HCl - > NaCl + H2O

    From the equation,

    nA = 1

    nB = 1

    From the question,

    Ma = 2.0 mol/L

    Va = 20 mL

    Mb = 0.5 mol/L

    Vb = ?

    MaVa / MbVb = nA / nB

    2x20 / 0.5 x Vb = 1

    0.5 x Vb = 2 x 20

    Divide both side by 0.5

    Vb = (2 x 20) / 0.5

    Vb = 80mL

    The volume of NaOH required is 80mL

    Since the reaction involves a strong acid and a strong base, a normal salt solution will be produced which is neutral to litmus paper. So since the salt solution is neutral to litmus paper then the pH of the resulting solution is 7
Know the Answer?
Not Sure About the Answer?
Get an answer to your question ✅ “What is the volume of a 0.5 mol/L NaOH solution required to completely react with 20 mL of a 2.0 mol/L HCl solution? What is the pH value ...” in 📙 Chemistry if there is no answer or all answers are wrong, use a search bar and try to find the answer among similar questions.
Search for Other Answers