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Standard XII

Chemistry

Limiting Reagent or Reactant

25 mL of 3.0 ...

Question

25 mL of 3.0 M $H N O_{3}$ is mixed with 75 mL of 4.0 M $H N O_{3}$ . If the volumes are additive, and 10 mL of this mixture is titrated against 2.5 M $N a O H$ , find the volume of $N a O H$ needed for complete neutralisation?

15 mL

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20 mL

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25 mL

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30 mL

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Solution

The correct option is A 15 mL
Dilution:
$M_{1} V_{1} + M_{2} V_{2} = M_{f} V_{f}$
$3.0 \times 25 + 4.0 \times 75 = M_{f} \times 100$
$M_{f} (H N O_{3}) = 3.75 M$
For neutralization:
$H N O_{3} + N a O H \to N a N O_{3} + H_{2} O$
$(M \times V \times n_{f})_{H N O_{3}} = (M \times V \times n_{f})_{N a O H}$
$n_{f}$ is 1 for $H N O_{3}$
$n_{f}$ is 1 for $N a O H$
$3.75 \times 10 = 2.5 \times V_{N a O H}$
$V_{N a O H} = 15 m L$

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Q. 25 mL of 3.0 M

H N O_{3}

is mixed with 75 mL of 4.0 M

H N O_{3}

. If the volumes are additive, and 10 mL of this mixture is titrated against 2.5 M

N a O H

, find the volume of

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needed for complete neutralisation?

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N a O H

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N a O H

is required for complete neutralization, if the initial volume of the acidic solution (V) is 10 mL?

25 m L

of a mixture of

N a O H

and

N a_{2} C O_{3}

when titrated with

N / 10 H C l

using phenolphthalein indicator required

25 m L H C l

. The same volume of mixture when titrated with

N / 10 H C l

using methyl orange indicator required

30 m L

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. Calculate the amount of

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and

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{C H}_{3} C O O H (50 m L, 0.1 M)

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Calculate the

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Limiting Reagent or Reactant

Standard XII Chemistry

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25 mL of 3.0 M HNO3 is mixed with 75 mL of 4.0 M HNO3. If the volumes are additive, and 10 mL of this mixture is titrated against 2.5 M NaOH, find the volume of NaOH needed for complete neutralisation?

The correct option is A 15 mLDilution: M1V1+M2V2=MfVf 3.0×25+4.0×75=Mf×100 Mf(HNO3)=3.75 M For neutralization: HNO3+NaOH→NaNO3+H2O (M×V×nf)HNO3=(M×V×nf)NaOH nf is 1 for HNO3 nf is 1 for NaOH 3.75×10=2.5×VNaOH VNaOH=15 mL

25 mL of 3.0 M $H N O_{3}$ is mixed with 75 mL of 4.0 M $H N O_{3}$ . If the volumes are additive, and 10 mL of this mixture is titrated against 2.5 M $N a O H$ , find the volume of $N a O H$ needed for complete neutralisation?