chem126--Acids III Calculations

# chem126--Acids III Calculations - SOME pH CALCULATIONS...

This preview shows pages 1–7. Sign up to view the full content.

SOME pH CALCULATIONS STRONG ACID + STRONG BASE EXAMPLE 11a: 50ml of 0.70 M HCl is mixed with 150 ml of 0.20 M Ca(OH) 2 . What is the final pH?

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
SOME pH CALCULATIONS STRONG ACID + STRONG BASE EXAMPLE 11a: 50ml of 0.70 M HCl is mixed with 150 ml of 0.20 M Ca(OH) 2 . What is the final pH? () 50 0.7 0.175 200 ml H MM ml + ⎡⎤ == ⎣⎦ () ( ) 2 150 0.2 0.15 200 ml Ca OH M M ml
SOME pH CALCULATIONS STRONG ACID + STRONG BASE EXAMPLE 11a: 50ml of 0.70 M HCl is mixed with 150 ml of 0.20 M Ca(OH) 2 . What is the final pH? () 50 0.7 0.175 200 ml H MM ml + ⎡⎤ == ⎣⎦ () ( ) 2 150 0.2 0.15 200 ml Ca OH M M ml 0.3 OH M ⇒=

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
SOME pH CALCULATIONS STRONG ACID + STRONG BASE EXAMPLE 11a: 50ml of 0.70 M HCl is mixed with 150 ml of 0.20 M Ca(OH) 2 . What is the final pH? () 50 0.7 0.175 200 ml H MM ml + ⎡⎤ == ⎣⎦ () ( ) 2 150 0.2 0.15 200 ml Ca OH M M ml 0.3 OH M ⇒= ( ) ( ) ( ) 2 Ha qO q H O l +− +→ Init. 0.175 M 0.3 M -0.175 -0.175 Change Eqm. 0 0.125 pOH = -log [OH - ]= -log(.125) = 0.90 pH = 14 - pOH =14 – 0.90 = 13.10
ANOTHER METHOD TO SOLVE EXAMPLE 11a EXAMPLE 11b: 50ml of 0.70 M HCl is mixed with 150 ml of 0.20 M Ca(OH) 2 . What is the final pH? First calculate the number of moles of acid and base:

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
ANOTHER METHOD TO SOLVE EXAMPLE 11a EXAMPLE 11b: 50ml of 0.70 M HCl is mixed with 150 ml of 0.20 M Ca(OH) 2 .
This is the end of the preview. Sign up to access the rest of the document.

## This note was uploaded on 04/07/2008 for the course CHEM 126 taught by Professor Biolsi during the Spring '08 term at NJIT.

### Page1 / 17

chem126--Acids III Calculations - SOME pH CALCULATIONS...

This preview shows document pages 1 - 7. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online