MY CART (5)

Use Coupon: CART20 and get 20% off on all online Study Material

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price: Rs.

There are no items in this cart.
Continue Shopping
Menu
Grade:
        


calculate the PH of following solution.


1.40ml 0.05M Na2CO3  + 50 ml of 0.040M of HCL


2.40 ml of 0.020M Na3Po4 + 40 ml of 0.040M of HCL


3. 50 mi of 0.1M Na3PO4 +50ml of 0.1M NaH2PO4


use data the following.


CO2+H20 EQL H+ +HCO3- K1 = 4.2X10^-7


HCO3- EQL H+ + CO3-2 K2=4.8X10^-11


H3PO4 EQL H+ + H2PO4- K1=7.3X10^-3


H2PO4- EQL H+ + HPO4-2 K2=602X10^-8


HPO4-2 EQL H+ + PO4-3 K3=1.0X10^-13


7 years ago

Answers : (2)

Vijay Luxmi Askiitiansexpert
357 Points
							

Dear Pankaj,

 

You have Posted the same question Twice... Please post the question once...

7 years ago
SAGAR SINGH - IIT DELHI
879 Points
							

Dear student,

Use this hint in these questions:

When the [H3O+] is 10-6 M, the pH is 6. Also, the [OH-] is 10-8 M and the pOH is 8. Again, the pH and the pOH add up to 14. When the [H3O+] is 10-5 M, pH is 5, [OH-] is 10-9 M, and pOH is 9. pH + pOH = 14.

However, the hydrogen ion concentration is not always going to be equal to exactly 1 x 10 raised to a negative number. For example, we skipped over the value of 2.0 x 10-7. This is more complicated. However, if you use a calculator that will handle logarithms, it is a very simple calculation. First you enter the hydronium ion concentration. You can use decimal format or scientific notation. Next push the log button. Then change the sign by pushing the +/- button. In this case we get 6.70 for the pH. The other values can be obtained in the same way.

 

Please feel free to ask your queries here. We are all IITians and here to help you in your IIT JEE preparation.

All the best.

Win exciting gifts by answering the questions on Discussion Forum. So help discuss any query on askiitians forum and become an Elite Expert League askiitian.

Now you score 5+15 POINTS by uploading your Pic and Downloading the Askiitians Toolbar  respectively : Click here to download the toolbar..

 

Askiitians Expert

Sagar Singh

B.Tech, IIT Delhi

sagarsingh24.iitd@gmail.com


7 years ago
Think You Can Provide A Better Answer ?
Answer & Earn Cool Goodies


Course Features

  • 731 Video Lectures
  • Revision Notes
  • Previous Year Papers
  • Mind Map
  • Study Planner
  • NCERT Solutions
  • Discussion Forum
  • Test paper with Video Solution


Course Features

  • 141 Video Lectures
  • Revision Notes
  • Test paper with Video Solution
  • Mind Map
  • Study Planner
  • NCERT Solutions
  • Discussion Forum
  • Previous Year Exam Questions


Ask Experts

Have any Question? Ask Experts

Post Question

 
 
Answer ‘n’ Earn
Attractive Gift
Vouchers
To Win!!! Click Here for details