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# Example Problem: Weak Base - PowerPoint PPT Presentation

Example Problem: Weak Base. Calculate the pH of a 0.005M solution of Ammonia. 0.005 M ------- 0 M 0 M . I C E. -x ------- +x +x . 0.005-x ------- +x +x . K b =1.8x10 -5 =. Assumption check:.

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## PowerPoint Slideshow about ' Example Problem: Weak Base' - tanek

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Calculate the pH of a 0.005M solution of Ammonia

0.005 M ------- 0 M 0 M

I

C

E

-x ------- +x +x

0.005-x ------- +x +x

Kb=1.8x10-5 =

Assumption check:

Example Problem Cont.: Weak Base

0.005 M ------- 0 M 0 M

I

E

Kb=1.8x10-5=

0.005-x ------- +x +x

Rearranging

=> x=2.91x10-4

Solve for pH

=-log(2.91x10-4)=3.53

10.5