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Question paper (AS) : Paper 1 - June 2018
0 Lactulose can also be used to treat people who have too high a concentration of 2 . 4 hydrogen ions (H+) in their blood. The normal range for blood H+ concentration is 3.55 × −10 8 to 4.47 × −10 8 mol dm−3 A patient was found to have a blood H+ concentration of 2.82 × 10−7 mol dm−3 Calculate the minimum percentage decrease required to bring the patient’s blood H+
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