Answers+to+Ch7

0 gmol 27 g 93 mol oh 2mol mgoh2 2 1 2 g58

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Unformatted text preview: 1. 2×10−3 =[H+ ][HC8 H4 O4- ]/[H2 C8 H4 O4 ] [H+ ] = [HC8 H4 O4- ] ; [H+ ]2 = (1. 2 ×10−3 )(2. 9) [H+ ] = [HC8 H4 O4- ] = 5. 9 ×10−2 M ; pH = 1.23 ; [C8 H4 O4- 2 ] = Ka2 = 3. 9×10−6 M 75. pOH = 14.00 − 11.68 = 2.32 ; [OH− ] = 4. 8×10−3 M 1. 8×10−5 =(4. 8 ×10−3 )(4. 8×10−3 )/[NH3 ] [NH3 ] = 1.3 M mol NH3 = (1.3 mol/L)(1.25 L)...
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