Horvath Practice Problems 54

Horvath Practice Problems 54 - Like above we rst write that...

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Like above we f rst write that appropriate reaction, H 2 C 6 H 6 O 6 ­ H + + HC 6 H 6 O 6 and produce an ICE chart [ H 2 C 6 H 6 O 6 ] £ H + ¤£ 6 H 6 O 6 ¤ I 0 . 10 0 0 C xx x E 0 . 10 x The K a 1 equation gives K a 1 =7 . 9 × 10 5 = ( x )( x ) (0 . 10 x ) . Rearranging and using the quadratic formula gives x = £ H + ¤ =0 . 0028 . Therefore the pH = log (0 . 0028) = 2 . 55 Example 3 : Calculate the concentration of C 6 H 6 O 2 6 for the case of example 2. Now we do need the second dissociation reaction 6 H 6 O 6 ­ H + + C 6 H 6 O 2 6 and we setup and ICE chart where we use the x = £
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