Question

i) Five solutions A,B,Cand D have the pH values 5,1,12, and 9

respectively.Which is a) Strongly acidic b) strongly alkaline c) weakly acidic

d) weakly basic

ii) identify the parent acid and base from which the salt is formed

a) Na2 CO3 b) CH3COONa

iii)What happens when gypsum is heated to373K



i)Match the following pH values 1, 7, 10, 13 to the solutions given below:

• Milk of magnesia • Gastric juices • Brine• Aqueous Sodium hydroxid

ii)write the chemical formula of bleaching powder and mention one

application

iii)give one example of a salt containing water of crystallisation


Guys please help me fast............​

Answer 1

a) D is neutral, as its pH value is equal to 7

b) C is strongly alkaline, as its pH value is 11.

c) B is strongly acidic, as its pH value is equal to 1

d) A is weakly acidic, as its pH value is equal to 4 and more than solution B.

e) E is weakly alkaline, as its pH value is equal to 9 and less than C.

pH value of the given solution in increasing order of hydrogen-ion concentration: 11<9<7<4<1