In which of the following acid-base titration, pH is greater than 8 at equivalence point?
Acetic acid versus ammonia
Acetic acid versus sodium hydroxide
Hydrochloric acid versus ammonia
Hydrochloric acid versus sodium hydroxide
B.
Acetic acid versus sodium hydroxide
In acetic acid versus sodium hydroxide titration, pH will be greater than 8 at quivalence point because acetic acid ia a weak acid while sodium hydroxide is a strong base. Therefore, at the equivalent point, there will be enough hydroxide ions left.
When the temperature of reactions will increase then the effect on pH value will
increase
decrease
first increases then decreases
remains same.
Consider the following salts : NaCl, HgCl2, Hg2Cl2, CuCl2, CuCl and AgCl. Identify the correct set of insoluble salts in water.
Hg2Cl2, CuCl, AgCl
Hg2Cl, CuCl, AgCl
Hg2Cl2, CuCl2, AgCl
Hg2Cl2, CuCl, NaCl
The pH of aqueous solution ofammonium formate is (pKa of HCOOH = 3.8 and pKb of NH3= 4.8)
7
6.0
6.5
8.9
For the reaction,
2SO2 (g) + O2 (g) 2SO3 (g) at 300 K, the value of G° is -690.9 R. The equilibrium constant value for the reaction at that temperature is (R is gas constant)
10 atm-1
10 atm
10
1