A solution contains KHCO3, K2CO3 and KOH either alone or in permissible combination. A 50.0 mL aliquot requires 25.0 mL of 0.100 M HCI to reach the phenolphthalein end point. Another 50.0 mL aliquot requires 45.0 mL of the same acid to reach the bromocresol green end point. Which of the following statements BEST describes the composition of the sample solution? O The solution contains more KOH than K2CO3. O The solution contains K2CO3 only. O The solution contains more KHCO3 than K2CO3. O The solution contains a mixture of KHCO3 and KOH. O The solution contains KOH only. O The solution contains more K2CO3 than KOH.

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Chapter1: Chemical Foundations
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A solution contains KHCO3, K2CO3 and KOH either alone or in permissible
combination. A 50.0 mL aliquot requires 25.0 mL of 0.100 M HCI to reach
the phenolphthalein end point. Another 50.0 mL aliquot requires 45.0 mL of
the same acid to reach the bromocresol green end point. Which of the
following statements BEST describes the composition of the sample
solution?
O The solution contains more KOH than K2CO3.
O The solution contains K2CO3 only.
O The solution contains more KHCO3 than K2CO3.
O The solution contains a mixture of KHCO3 and KOH.
O The solution contains KOH only.
O The solution contains more K2CO3 than KOH.
Transcribed Image Text:A solution contains KHCO3, K2CO3 and KOH either alone or in permissible combination. A 50.0 mL aliquot requires 25.0 mL of 0.100 M HCI to reach the phenolphthalein end point. Another 50.0 mL aliquot requires 45.0 mL of the same acid to reach the bromocresol green end point. Which of the following statements BEST describes the composition of the sample solution? O The solution contains more KOH than K2CO3. O The solution contains K2CO3 only. O The solution contains more KHCO3 than K2CO3. O The solution contains a mixture of KHCO3 and KOH. O The solution contains KOH only. O The solution contains more K2CO3 than KOH.
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