pH concept
CHXI07:EQUILIBRIUM

315038 When \(10 \mathrm{~mL}\) of \(0.1 \mathrm{M}\) acetic acid \(\left(\mathrm{pK}_{\mathrm{a}}=5.0\right)\) is titrated against \(10 \mathrm{~mL}\) of \(0.1 \mathrm{M}\) ammonia solution \(\left(\mathrm{pK}_{\mathrm{b}}=5.0\right)\), the equivalence point occurs at \(\mathrm{pH}\).

1 5.0
2 6.0
3 7.0
4 9.0
CHXI07:EQUILIBRIUM

315039 The pH of 0.01 M HCOOH will be ____ .
[Given: \({\mathrm{\sqrt{\mathrm{K}_{\mathrm{a}}}=1.18 \times 10^{-2}}}\),
\({\mathrm{\left.\log _{10} 1.18=0.0719\right]}}\)

1 1.93
2 4.93
3 2.93
4 1.18
CHXI07:EQUILIBRIUM

315040 A weak mono-basic acid solution has a molarity of \(0.005 \mathrm{M}\) and \(\mathrm{pH}\) of 5 . What is the percentage ionisation of acid in this solution?

1 2.0
2 0.2
3 0.5
4 20.0
CHXI07:EQUILIBRIUM

315041 The \(\mathrm{pH}\) of a solution at \(25^{\circ} \mathrm{C}\) is \({\text{2}}\) . If its \(\mathrm{pH}\) is to be changed to \({\text{4}}\) , then conc. of \(\mathrm{H}^{+}\)of the original has to be

1 Doubled
2 Halved
3 Increased by 100 times
4 Decreased by 100 times
CHXI07:EQUILIBRIUM

315042 How many \(\mathrm{H}^{+}\)ions are present in \(10 \mathrm{~mL}\) of a solution having \(\mathrm{pH}=10\) ?

1 \(10^{10}\)
2 \(10^{-10}\)
3 \(6.02 \times 10^{23}\)
4 \(6.02 \times 10^{11}\)
CHXI07:EQUILIBRIUM

315038 When \(10 \mathrm{~mL}\) of \(0.1 \mathrm{M}\) acetic acid \(\left(\mathrm{pK}_{\mathrm{a}}=5.0\right)\) is titrated against \(10 \mathrm{~mL}\) of \(0.1 \mathrm{M}\) ammonia solution \(\left(\mathrm{pK}_{\mathrm{b}}=5.0\right)\), the equivalence point occurs at \(\mathrm{pH}\).

1 5.0
2 6.0
3 7.0
4 9.0
CHXI07:EQUILIBRIUM

315039 The pH of 0.01 M HCOOH will be ____ .
[Given: \({\mathrm{\sqrt{\mathrm{K}_{\mathrm{a}}}=1.18 \times 10^{-2}}}\),
\({\mathrm{\left.\log _{10} 1.18=0.0719\right]}}\)

1 1.93
2 4.93
3 2.93
4 1.18
CHXI07:EQUILIBRIUM

315040 A weak mono-basic acid solution has a molarity of \(0.005 \mathrm{M}\) and \(\mathrm{pH}\) of 5 . What is the percentage ionisation of acid in this solution?

1 2.0
2 0.2
3 0.5
4 20.0
CHXI07:EQUILIBRIUM

315041 The \(\mathrm{pH}\) of a solution at \(25^{\circ} \mathrm{C}\) is \({\text{2}}\) . If its \(\mathrm{pH}\) is to be changed to \({\text{4}}\) , then conc. of \(\mathrm{H}^{+}\)of the original has to be

1 Doubled
2 Halved
3 Increased by 100 times
4 Decreased by 100 times
CHXI07:EQUILIBRIUM

315042 How many \(\mathrm{H}^{+}\)ions are present in \(10 \mathrm{~mL}\) of a solution having \(\mathrm{pH}=10\) ?

1 \(10^{10}\)
2 \(10^{-10}\)
3 \(6.02 \times 10^{23}\)
4 \(6.02 \times 10^{11}\)
CHXI07:EQUILIBRIUM

315038 When \(10 \mathrm{~mL}\) of \(0.1 \mathrm{M}\) acetic acid \(\left(\mathrm{pK}_{\mathrm{a}}=5.0\right)\) is titrated against \(10 \mathrm{~mL}\) of \(0.1 \mathrm{M}\) ammonia solution \(\left(\mathrm{pK}_{\mathrm{b}}=5.0\right)\), the equivalence point occurs at \(\mathrm{pH}\).

1 5.0
2 6.0
3 7.0
4 9.0
CHXI07:EQUILIBRIUM

315039 The pH of 0.01 M HCOOH will be ____ .
[Given: \({\mathrm{\sqrt{\mathrm{K}_{\mathrm{a}}}=1.18 \times 10^{-2}}}\),
\({\mathrm{\left.\log _{10} 1.18=0.0719\right]}}\)

1 1.93
2 4.93
3 2.93
4 1.18
CHXI07:EQUILIBRIUM

315040 A weak mono-basic acid solution has a molarity of \(0.005 \mathrm{M}\) and \(\mathrm{pH}\) of 5 . What is the percentage ionisation of acid in this solution?

1 2.0
2 0.2
3 0.5
4 20.0
CHXI07:EQUILIBRIUM

315041 The \(\mathrm{pH}\) of a solution at \(25^{\circ} \mathrm{C}\) is \({\text{2}}\) . If its \(\mathrm{pH}\) is to be changed to \({\text{4}}\) , then conc. of \(\mathrm{H}^{+}\)of the original has to be

1 Doubled
2 Halved
3 Increased by 100 times
4 Decreased by 100 times
CHXI07:EQUILIBRIUM

315042 How many \(\mathrm{H}^{+}\)ions are present in \(10 \mathrm{~mL}\) of a solution having \(\mathrm{pH}=10\) ?

1 \(10^{10}\)
2 \(10^{-10}\)
3 \(6.02 \times 10^{23}\)
4 \(6.02 \times 10^{11}\)
CHXI07:EQUILIBRIUM

315038 When \(10 \mathrm{~mL}\) of \(0.1 \mathrm{M}\) acetic acid \(\left(\mathrm{pK}_{\mathrm{a}}=5.0\right)\) is titrated against \(10 \mathrm{~mL}\) of \(0.1 \mathrm{M}\) ammonia solution \(\left(\mathrm{pK}_{\mathrm{b}}=5.0\right)\), the equivalence point occurs at \(\mathrm{pH}\).

1 5.0
2 6.0
3 7.0
4 9.0
CHXI07:EQUILIBRIUM

315039 The pH of 0.01 M HCOOH will be ____ .
[Given: \({\mathrm{\sqrt{\mathrm{K}_{\mathrm{a}}}=1.18 \times 10^{-2}}}\),
\({\mathrm{\left.\log _{10} 1.18=0.0719\right]}}\)

1 1.93
2 4.93
3 2.93
4 1.18
CHXI07:EQUILIBRIUM

315040 A weak mono-basic acid solution has a molarity of \(0.005 \mathrm{M}\) and \(\mathrm{pH}\) of 5 . What is the percentage ionisation of acid in this solution?

1 2.0
2 0.2
3 0.5
4 20.0
CHXI07:EQUILIBRIUM

315041 The \(\mathrm{pH}\) of a solution at \(25^{\circ} \mathrm{C}\) is \({\text{2}}\) . If its \(\mathrm{pH}\) is to be changed to \({\text{4}}\) , then conc. of \(\mathrm{H}^{+}\)of the original has to be

1 Doubled
2 Halved
3 Increased by 100 times
4 Decreased by 100 times
CHXI07:EQUILIBRIUM

315042 How many \(\mathrm{H}^{+}\)ions are present in \(10 \mathrm{~mL}\) of a solution having \(\mathrm{pH}=10\) ?

1 \(10^{10}\)
2 \(10^{-10}\)
3 \(6.02 \times 10^{23}\)
4 \(6.02 \times 10^{11}\)
CHXI07:EQUILIBRIUM

315038 When \(10 \mathrm{~mL}\) of \(0.1 \mathrm{M}\) acetic acid \(\left(\mathrm{pK}_{\mathrm{a}}=5.0\right)\) is titrated against \(10 \mathrm{~mL}\) of \(0.1 \mathrm{M}\) ammonia solution \(\left(\mathrm{pK}_{\mathrm{b}}=5.0\right)\), the equivalence point occurs at \(\mathrm{pH}\).

1 5.0
2 6.0
3 7.0
4 9.0
CHXI07:EQUILIBRIUM

315039 The pH of 0.01 M HCOOH will be ____ .
[Given: \({\mathrm{\sqrt{\mathrm{K}_{\mathrm{a}}}=1.18 \times 10^{-2}}}\),
\({\mathrm{\left.\log _{10} 1.18=0.0719\right]}}\)

1 1.93
2 4.93
3 2.93
4 1.18
CHXI07:EQUILIBRIUM

315040 A weak mono-basic acid solution has a molarity of \(0.005 \mathrm{M}\) and \(\mathrm{pH}\) of 5 . What is the percentage ionisation of acid in this solution?

1 2.0
2 0.2
3 0.5
4 20.0
CHXI07:EQUILIBRIUM

315041 The \(\mathrm{pH}\) of a solution at \(25^{\circ} \mathrm{C}\) is \({\text{2}}\) . If its \(\mathrm{pH}\) is to be changed to \({\text{4}}\) , then conc. of \(\mathrm{H}^{+}\)of the original has to be

1 Doubled
2 Halved
3 Increased by 100 times
4 Decreased by 100 times
CHXI07:EQUILIBRIUM

315042 How many \(\mathrm{H}^{+}\)ions are present in \(10 \mathrm{~mL}\) of a solution having \(\mathrm{pH}=10\) ?

1 \(10^{10}\)
2 \(10^{-10}\)
3 \(6.02 \times 10^{23}\)
4 \(6.02 \times 10^{11}\)