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What will be pH of solution when 0.02 mole of hydrochloric acid in 2 litres of the solution
- a)2
- b)1
- c)– 2
- d)10
Correct answer is option 'A'. Can you explain this answer?
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What will be pH of solution when 0.02 mole of hydrochloric acid in 2 l...
Calculation of pH of the solution
1. Given data:
- Moles of hydrochloric acid (HCl) = 0.02 moles
- Volume of solution = 2 litres
2. Calculating the molarity of the solution:
- Molarity (M) = Number of moles / Volume of solution in litres
- M = 0.02 moles / 2 litres
- M = 0.01 M
3. Calculating pH of the solution:
- pH = -log[H+], where [H+] is the concentration of hydrogen ions
- In the case of HCl, 1 mole of HCl produces 1 mole of H+ ions
- Therefore, concentration of H+ ions = Molarity of HCl
- pH = -log(0.01)
- pH = 2
Therefore, the pH of the solution containing 0.02 mole of hydrochloric acid in 2 litres of the solution is 2. Hence, the correct answer is option 'A', which is 2.
1. Given data:
- Moles of hydrochloric acid (HCl) = 0.02 moles
- Volume of solution = 2 litres
2. Calculating the molarity of the solution:
- Molarity (M) = Number of moles / Volume of solution in litres
- M = 0.02 moles / 2 litres
- M = 0.01 M
3. Calculating pH of the solution:
- pH = -log[H+], where [H+] is the concentration of hydrogen ions
- In the case of HCl, 1 mole of HCl produces 1 mole of H+ ions
- Therefore, concentration of H+ ions = Molarity of HCl
- pH = -log(0.01)
- pH = 2
Therefore, the pH of the solution containing 0.02 mole of hydrochloric acid in 2 litres of the solution is 2. Hence, the correct answer is option 'A', which is 2.
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Community Answer
What will be pH of solution when 0.02 mole of hydrochloric acid in 2 l...
Molar concentration of HCl acid solution = 0.02/2L = 0.01 mol L–1
= 10–2 mol L–1
pH = – log [H+]
pH = – log (10–2)
pH = 2 log 10
pH = 2
= 10–2 mol L–1
pH = – log [H+]
pH = – log (10–2)
pH = 2 log 10
pH = 2
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What will be pH of solution when 0.02 mole of hydrochloric acid in 2 litres of the solutiona)2b)1c)– 2d)10Correct answer is option 'A'. Can you explain this answer?
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