Chemical Forums

Chemistry Forums for Students => High School Chemistry Forum => Topic started by: medbio on March 18, 2006, 04:34:02 AM

Title: pH calculation
Post by: medbio on March 18, 2006, 04:34:02 AM

Hi! Can anybody help me with this calculation?

What is the pH of a mixture of 50ml of 0.1M HCl and 30ml of 0.1M NaOH?

Title: Re:pH calculation
Post by: Albert on March 18, 2006, 04:41:46 AM

Hint: convert everything in moles and, then, focus on H+ and OH-

Title: Re:pH calculation
Post by: Borek on March 18, 2006, 06:43:49 AM

To add to Albert post: start with reaction equation. This is limiting reagent question.

Title: Re:pH calculation
Post by: Borek on March 18, 2006, 06:44:41 AM

Quote from: The_Terminator on March 18, 2006, 06:43:02 AM

Keep in mind: Ph = Pk + C of Salt / C of Acid.

k = The constand dissension of the acid
C = the consentration

This is completely of no use, as NaOH is strong base nad HCl is strong acid.

http://www.chembuddy.com/?left=pH-calculation-questions&right=pH-of-mixture-q1 (http://www.chembuddy.com/?left=pH-calculation-questions&right=pH-of-mixture-q1)