Home
Class 12
CHEMISTRY
The pH of a solution obtained by mixing ...

The pH of a solution obtained by mixing 50 mL of 1 N HCl and 30 mL of 1 N NaOH is [log 2.5 =0.3979]

A

a)`3.979`

B

b)`0.6021`

C

c)`12.042`

D

d)`1.2042`

Text Solution

Verified by Experts

The correct Answer is:
B
Concentration of mixture ,br> `("conc of acid "xx"its volume - conc of base"xx"its volume")/("Total volume")`
`N=(N_(1)V_(1)-N_(2)V_(2))/(V_(1)+V_(2))`
`=(50xx1-30xx1)/(50+30)`
`=(20)/(80)`
`=(1)/(4)`
`=0.25`
Since HCl is in excess , so mixture is acidic and mixture contains `[H^(+)]` ion . Thus ,
`[H^(+)]=0.25`
`pH=-log[H^(+)]`
`=-log0.25`
`=0.6021`
Promotional Banner

Similar Questions

Explore conceptually related problems

The molarity of a solution obtained by mixing 750mL of 0.5 M HCl with 250 mL of 2M HCl will be

The pH of the resultant solution obtained by mixing 20mL of 0.01 M HCl and 20mL of 0.005M Ca(OH)_(2) is

What is the pH of a solution formed by mixing 40 ml of 0.1 M HCI and 10 ml 0.45 M NaOH?

The pH of the solution obtained by mixing equal volumes of two solutions of pH = 3 and pH = 5 is (log 3 = 0, log 5 = 0.7)

Calculate the pH of a solution when (i) 49.9 ml of 0.1 M NaOH and (ii) 50.0 ml of 0.1M NaOH added to 50 ml of 0.1 M HCl