Home
Class 12
CHEMISTRY
100 mL of 0.2 N HCI is added to 100 mL o...

100 mL of 0.2 N HCI is added to 100 mL of 0.18 N NaOH and whole volume is made one litre. What will be the pH of resulting solution.

Text Solution

AI Generated Solution

The correct Answer is:
To solve the problem step by step, we will follow these instructions: ### Step 1: Calculate the moles of HCl and NaOH 1. **Calculate moles of HCl:** - Normality (N) of HCl = 0.2 N - Volume (V) of HCl = 100 mL = 0.1 L - Moles of HCl = Normality × Volume = 0.2 N × 0.1 L = 0.02 moles 2. **Calculate moles of NaOH:** - Normality (N) of NaOH = 0.18 N - Volume (V) of NaOH = 100 mL = 0.1 L - Moles of NaOH = Normality × Volume = 0.18 N × 0.1 L = 0.018 moles ### Step 2: Determine the limiting reagent and the remaining moles - Since HCl and NaOH react in a 1:1 ratio: - Moles of HCl = 0.02 moles - Moles of NaOH = 0.018 moles - NaOH is the limiting reagent because it is present in a smaller amount. ### Step 3: Calculate the remaining moles after the reaction - Moles of HCl remaining after reaction: - Moles of HCl consumed = Moles of NaOH = 0.018 moles - Remaining moles of HCl = 0.02 moles - 0.018 moles = 0.002 moles ### Step 4: Calculate the concentration of H⁺ ions - The total volume of the solution after mixing is 1 L. - Concentration of H⁺ ions = Remaining moles of HCl / Total volume - Concentration of H⁺ = 0.002 moles / 1 L = 0.002 M ### Step 5: Calculate the pH of the solution - pH = -log[H⁺] - pH = -log(0.002) - pH ≈ 2.69 ### Final Answer: The pH of the resulting solution is approximately **2.69**. ---
Promotional Banner

Topper's Solved these Questions

  • CONCEPT OF ACIDS AND BASES

    FIITJEE|Exercise MATCHING LIST TYPE QUESTIONS|1 Videos

  • CHEMISTRY IN EVERY DAY LIFE

    FIITJEE|Exercise ASSIGNMENT PROBLEMS (OBJECTIVE) Level - II (Numerical Based Questions)|5 Videos

  • ELECTROCHEMISTRY

    FIITJEE|Exercise Matcing Type Single Correct Questions|3 Videos

Similar Questions

Explore conceptually related problems

100 c.c of N/10 NaOH solution is mixed with 100 c.c of N/5 HCI solution and the whole volume is made to 1 litre . The pH of the resulting solution will be

If 100 mL of 0.100 M HCl solution and 100 mL of 0.100 M NaOH are mixed, what is the molarity of the salt in the resulting sollution? Assuming that the volumes are additive.

100 mL of 0.2 N NaOH is mixed with 100 mL 0.1 NHCl and the solution is made 1L. The pH of the solution is :

100ml of 0.2 M H_(2)SO_(4) is added to 100 ml of 0.2 M NaOH . The resulting solution will be

20 mL of 0.1N HCI is mixed with 20 ml of 0.1N KOH . The pH of the solution would be

100 ml of 0.2 NHCl solution is added to 100 ml of 0.2 N AgNO_(3) solution. The molarity of nitrate ions in the resulting mixture will be

Knowledge Check

  • 100 c.c of N/10 NaOH solution is mixed with 100 c.c of N/5 HCI solution and the whole volume is made to 1 litre . The pH of the resulting solution will be

    A
    1
    B
    2
    C
    3
    D
    4

  • If 100 mL of 0.100 M HCl solution and 100 mL of 0.100 M NaOH are mixed, what is the molarity of the salt in the resulting sollution? Assuming that the volumes are additive.

    A
    `0.0100 M`
    B
    `0.0500 M`
    C
    `0.0033 M`
    D
    `0.0025 M`

  • 100 mL of 0.2 N NaOH is mixed with 100 mL 0.1 NHCl and the solution is made 1L. The pH of the solution is :

    A
    4
    B
    8
    C
    10
    D
    12