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This quiz contains 5 questions from a mix of 1 subtopics.

Calculate the mean titre, in cm3, of the following titration results.

Give your answer to 3 decimal places.

21.325

cm3

cm3

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What is the overall balanced equation for the reaction between manganate(VII) ions and ethanedioate ions?

MnO4- + 8H+ + 5C2O42- ➔ Mn2+ + 10CO2 + 4H2O

MnO4- + 8H+ + C2O42- ➔ Mn2+ + 2CO2 + 4H2O

2MnO4- + 16H+ + 5C2O42- ➔ 2Mn2+ + 10CO2 + 8H2O

2MnO4- + 16H+ + C2O42- ➔ 2Mn2+ + 2CO2 + 8H2O

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What is the overall balanced equation for the reaction between manganate(VII) ions and iron(II) ions?

MnO4- + 8H+ + 5Fe2+ ➔ Mn2+ + 4H2O + 5Fe3+

MnO4- + 8H+ + Fe3+ ➔ Mn2+ + 4H2O + Fe2+

MnO4- + 8H+ + 5Fe3+ ➔ Mn2+ + 4H2O + 5Fe2+

MnO4- + 8H+ + Fe2+ ➔ Mn2+ + 4H2O + Fe3+

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Manganate(VII) titrations can be used for the analysis of many different agents such as Fe2+ ions and (COOH)2.

reducing

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What is the colour change at the end point of an iron-manganate(VII) titration?

colourless to black

colourless to purple

black to colourless

purple to colourless

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