【Daily Question】Chemical Analysis Version 2019.1.16

2019-01-16View Original

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This post was last edited by zjp on 2019-1-16 08:33. Multiple-choice question: For each of the following mixed solutions. What has buffering capacity at pH? （） A. 100 ml of 1 mol/L HAc + 100 ml of 1 mol/L NaOH ； B. 100 ml of 1 mol/L HCl + 200 ml of 2 mol/L NH3•H2O ； C. 200 ml of 1 mol/L HAc + 100 ml of 1 mol/L NaOH ； D. 100 ml of 1 mol/L NH4Cl + 100 ml of 1 mol/L NH3•H2O; BCD

Reply #22019-01-16

C. 200 ml of 1 mol/L HAc + 100 ml of 1 mol/L NaOH ；

Reply #32019-01-16

A. 100 ml of 1 mol/L HAc + 100 ml of 1 mol/L NaOH ； B. 100 ml of 1 mol/L HCl + 200 ml of 2 mol/L NH3•H2O ； C. 200 ml of 1 mol/L HAc + 100 ml of 1 mol/L NaOH ；

Reply #42019-01-16

B. 100 ml of 1 mol/L HCl + 200 ml of 2 mol/L NH3•H2O；

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【Daily Question】Chemical Analysis Version 2019.1.16

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