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lisov135 [29]
3 years ago
13

A buffer is made up of 0.300 L of each of 0.500 M KH2PO4 and 0.317 M K2HPO4. Assuming that volumes are additive, (a.) calculate

the pH of the buffer after the addition of 0.0500 mol of HCl to 0.600 L of buffer and (b.) the pH of the buffer after the addition of 0.0500 lol of NaOH to 0.600 L of the buffer. (pKa=7.21)
Chemistry
1 answer:
lys-0071 [83]3 years ago
8 0
<span>(b.) the pH of the buffer after the addition of 0.0500</span>
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The answers to your question are below

Explanation:

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                                    x       -------------------  6.85 x 10 ²⁰

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MW SO2 = 32 + 32 = 64g

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                                    x      --------------------  3.3×1022 SO2 molecules

                                    x = (3.3×1022 SO2)(64) / 6.023 x 10²³

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                                  x     ------------------   5.5×1025 O3 molecules

                               x = (5.5×1025 )(48) /  6.023 x 10²³

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MW = 12 + 4 = 16 g

                              16 g --------------------  6.023 x 10²³ molecules

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                           x = 0.0025 g

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