The pH of a solution obtained by mixing 50 mL of 1 M HCl and 30 mL of 1 M NaOH is x-10-4- The value of x is Nearest intger- -log2-5-0-3979-

nbsp; nbsp; No of moles of H^+ from HCl is, 50 × 1 = 50 mmol No of moles of OH^ from NaOH nbsp;is, 30 nbsp;× 1 = 30 mmol 30 mmol of OH^ will neutra ...

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Byju's Answer

Standard XII

Chemistry

Ostwald Dilution Law Mathematical Interpretation

The pH of a s...

Question

The pH of a solution obtained by mixing $50 m L$ of $1 M H C l$ and $30 m L$ of $1 M N a O H$ is $x \times 10^{- 4}$ . The value of x is ______(Nearest intger). [log2.5=0.3979]

Open in App

Solution

No of moles of $H^{+}$ from HCl is,
$50 \times 1 = 50 m m o l$
No of moles of $O H^{-}$ from NaOH is,
$30 \times 1 = 30 m m o l$

$30 m m o l$ of $O H^{-}$ will neutralise $30 m m o l$ of $H^{+}$ and the solution left with $20 m m o l$ of $H^{+}$
$∴$
Concentration of $H^{+}$ is,
$[H C l] = \frac{20}{80} = \frac{1}{4} M = 2.5 \times 10^{- 1} M$

$p H = - log 2.5 \times 10^{- 1} = 1 - 0.3979 = 0.6021$

$p H = 6021 \times 10^{- 4}$

Suggest Corrections

Similar questions

Q. The

p H

of the solution obtained by mixing

10 m L

10^{- 1} H C l

and

10 m L

10^{- 1} N N a O H

is:

Q. What is the

p H

of a solution obtained by mixing

10

mL of

0.1

H C l

and

40

mL of

0.2

H_{2} S O_{4}

Q. The following solutions were prepared by mixing different volumes of NaOH and HCl of different concentrations
1. 60 mL

\frac{M}{10}

HCl + 40 mL

\frac{M}{10}

NaOH

2. 55 mL

\frac{M}{10}

HCl + 45 mL

\frac{M}{10}

NaOH

3. 75 mL

\frac{M}{5}

HCl + 25 mL

\frac{M}{5}

NaOH

4. 100 mL

\frac{M}{10}

HCl + 100 mL

\frac{M}{10}

NaOH

pH of which one of them will be equal to 1?

50 m L

0.1 M H C l

and

50 m L

0.2 M N a O H

are mixed. The pH of the resulting solution is

Join BYJU'S Learning Program

The pH of a solution obtained by mixing 50 mL of 1 M HCl and 30 mL of 1 M NaOH is x×10−4. The value of x is ______(Nearest intger). [log2.5=0.3979]

The pH of a solution obtained by mixing $50 m L$ of $1 M H C l$ and $30 m L$ of $1 M N a O H$ is $x \times 10^{- 4}$ . The value of x is ______(Nearest intger). [log2.5=0.3979]