Question

1) WHAT DO YOU MEAN BY IONIC PRODUCT OF WATER AND PH VALUE?
2) YOU ARE GIVEN 1 M H2SO4 SOLUTION. HOW WILL YOU PREPARE FROM IT 400ML OF A SOLUTION WITH PH=2?
3)USING SOLID NaOH HOW WILL YOU PREPARE 400 ML OF A SOLUTION WITH PH=12?
4)a solution in test tube A turns red litmus blue evolves hydrogen on reaction with zinc and does not react with sodium carbonate whereas solution in test tube B turn blue Litmus to Red liberates hydrogen on reaction with zinc and carbon dioxide with SODIUM CARBONATE identify solution A and B

Answer 1

Answer:

1-Ionic product of water

[H+][OH-]=Kw

and kw= 10^-14

Answer 2

Answer:

(a)The product of concentrations of and ions in water at a particular temperature is known as ionic product of water.” It is designated as . ... ⇌ ; ; ; The value of increases with the increase of temperature, i.e., the concentration H+ and OH– ions increases with increase in temperature.

(b)&(c) Total value of the solution 400 ml + 400ml = 800ml = 0.8 l.

The number of moles of hydrogen ions present in 400 ml of 1M H2SO4 solution = 2 × 1 × 400/1000 = 0.8 mole

The number of moles of hydrogen ions present in 400 ml of 1M HCl solution = 12 × 1 × 400/1000 = 4.8 mole

Hence, H+ = 5.6/0.8 = 7