Question

1) 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) Na, CO3 b) CH3COONa
iii) What happens when gypsum is heated to373K
or
i) Match the following pH values 1, 7, 10, 13 to the solutions given below:
Milk of magnesia. Gastric juices • Brine• Aqueous Sodium hydroxide,
ii) write the chemical formula of bleaching powder and mention one
application
iii)give one example of a salt containing water of crystallisation​

Answer 1

Answer:

d) Na[Na,(PO3)4] + 2 CaSO4(a) Avogadro's number

(b) 4×6.022×10

23

=24.088×10

23

carbon atoms

(c) CO

2

moleculesd) Na[Na,(PO3)4] + 2 CaSO4(a) Avogadro's number

(b) 4×6.022×10

23

=24.088×10

23

carbon atoms

(c) CO

2

molecules

Explanation:

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Answer 2

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