help@askiitians.com

+91-93193 64476

AIIMS MBBS> Calculate the pH of the solution in which...

question mark

Calculate the pH of the solution in which 0.2M NH4Cl and 0.1M NH3 are present. The pKb of ammonia solution is 4.75.

Abhishek Dogra , 7 Years ago

Grade 11

1 Answers

Arun

Dear Abhishek

To solve pH of buffer solutions you use the Henderson - Hasselbalch equation for basic buffers:
Because you have a basic buffer first solve for pOH
pOH = pKb + log ([salt]/[base])
You have pKb = 4.75
You have [salt] = 0.2M
You have [base] = 0.1M
Substitute into equation:
pOH = 4.75 + log (0.2/0.1)
pOH = 4.75 + log 2
pOH = 4.75 + 0.30
pOH = 5.05

pH = 14.00-pOH
pH = 14.00-5.05
pH = 8.95

Regards

Arun (askIITians Forum expert)

Approved

Last Activity: 7 Years ago

LIVE ONLINE CLASSES

Prepraring for the competition made easy just by live online class.

Full Live Access

Study Material

Live Doubts Solving

Daily Class Assignments

most scoring topics for neet?for all the subjects : chemisrtry,biology and physics

aiims mbbs

1 Answer Available

Last Activity: 3 Years ago

Consider the situation shown in figure. The strings are massless and pulley is fixed and frictionless. The speed of 3 kg mass just before touching the ground is (g = 10 m s-²)

aiims mbbs

1 Answer Available

Last Activity: 3 Years ago

Hi! My son would be taking his exam in May 2022. We need some counseling as to how to go about it as an NRI?

aiims mbbs

1 Answer Available

Last Activity: 4 Years ago

I am not diagnosed with Schizoaffective disorder. I am recently diagnosed with Bipolar 1 disorder (most recent or current manic) along with the symptoms of grandiose delusions (According to the psychiatrist, I believe myself I am God). I am not diagnosed with schizoaffective disorder but I had taken Olanzapine (increased to 5 mg dosage) and this drug is used to treat Schizophrenia but as prescribed by Psychiatrist, I was taking Olanzapine not for Schizoaffective disorder but for Bipolar disorder along with delusions. Another Psychiatrist from Lybrate platform told me that, "you might be suffering from schizoaffective disorder, and it requires immediate action of a doctor. Consult a psychiatrist as soon as possible." So, does this mean that I am diagnosed with Schizoaffective disorder or suffering from Schizoaffective disorder? If I really have Schizoaffective disorder, then who will marry me? It's better to commit Suicide as Schizoaffective disorder is the most critical psychological disorder. Does the psychiatrist indirectly told me that I am having Schizoaffective disorder in the form of Bipolar 1 disorder along with grandiose delusions symptoms?

aiims mbbs

1 Answer Available

Last Activity: 4 Years ago

100 ml of gaseous hydrocarbon consumes 300 ml of oxygen for complete combustion. the hydrocarbon is

aiims mbbs

0 Answer Available

Last Activity: 4 Years ago

View all Questions