A 0.2 g sample of NazC204 consumed 30.92 ml of KMN04 to reach the faint pink endpoint in the standardization ofKMNO4 solution. This standardized solution was used to analyze the calcium in a milk sample (density = 1.21 8/mL) bypermanganimetry. A 5.9 ml of the milk sample was diluted to 250.0 mL, and a 25.00 mL aliquot was treated with(NH4)2C204 to precipitate calcium as Cac,04+H2O. Digestion, filtration and addition of acid followed and during titration,20.01 mL of standardized KMNO4 was consumed. Calculate the % Ca (W/w) of the milk sample analyzed. Express youranswer in 2 decimal places. No need to include the unit.MM (g/mol): NazC204 = 134 ; Ca = 40.08Pertinent redox reactions:NazC204 + 2H30* → H2C204 + 2H20 + 2Na*2Mno4 + 5H2C204 + 6H30* → 2MN2- + 10CO2 + 14H20Caco3 + 2H30* → Ca2- + CO2 (g) + 3H2OCa2* + C2042 + H2O → CaC204+H2O(s)CaC204+H2O(s) + 2H30* – Ca2* + H2C204+ H20Round your answer to 2 decimal places.

Answered: Image /qna-images/answer/96713804-8c76-40a5-8849-692d2c19e02f.jpg

A 0.2 g sample of NazC204 consumed 30.92 mL of KMNO4 to reach the faint pink endpoint in the standardization of KMNO4 solution. This standardized solution was used to analyze the calcium in a milk sample (density = 1.21 8/mL) by permanganimetry. A 5.9 mL of the milk sample was diluted to 250.0 mL, and a 25.00 mL aliquot was treated with (NH4)2C2O4 to precipitate calcium as CaC204•H20. Digestion, filtration and addition of acid followed and during titrationm 20.01 mL of standardized KMNO4 was consumed. Calculate the % Ca (W/w) of the milk sample analyzed. Express your answer in 2 decimal places. No need to include the unit. MM (g/mol): NazC204 = 134 ; Ca = 40.08 Pertinent redox reactions: NażC2O4 + 2H3O* – H2C204 + 2H2O + 2Na* 2MNO4“+ 5H2C2O4 +6H3O* → 2MN2- + 10CO2 + 14H20 Caco3 + 2H30* → Ca2* + CO2(g) + 3H2O Ca2* + C2042 + H20 → CaC204+H2O3) CaC204*H2O(s) + 2H3O* → Ca2* + H2C204+ H2O Round your answer to 2 decimal places.

A 0.2 g sample of NazC204 consumed 30.92 mL of KMNO4 to reach the faint pink endpoint in the standardization of KMNO4 solution. This standardized solution was used to analyze the calcium in a milk sample (density = 1.21 8/mL) by permanganimetry. A 5.9 mL of the milk sample was diluted to 250.0 mL, and a 25.00 mL aliquot was treated with (NH4)2C2O4 to precipitate calcium as CaC204•H20. Digestion, filtration and addition of acid followed and during titrationm 20.01 mL of standardized KMNO4 was consumed. Calculate the % Ca (W/w) of the milk sample analyzed. Express your answer in 2 decimal places. No need to include the unit. MM (g/mol): NazC204 = 134 ; Ca = 40.08 Pertinent redox reactions: NażC2O4 + 2H3O* – H2C204 + 2H2O + 2Na* 2MNO4“+ 5H2C2O4 +6H3O* → 2MN2- + 10CO2 + 14H20 Caco3 + 2H30* → Ca2* + CO2(g) + 3H2O Ca2* + C2042 + H20 → CaC204+H2O3) CaC204H2O(s) + 2H3O → Ca2* + H2C204+ H2O Round your answer to 2 decimal places.

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ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

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Question

A 0.2 g sample of NazC204 consumed 30.92 ml of KMN04 to reach the faint pink endpoint in the standardization of
KMNO4 solution. This standardized solution was used to analyze the calcium in a milk sample (density = 1.21 8/mL) by
permanganimetry. A 5.9 ml of the milk sample was diluted to 250.0 mL, and a 25.00 mL aliquot was treated with
(NH4)2C204 to precipitate calcium as Cac,04+H2O. Digestion, filtration and addition of acid followed and during titration,
20.01 mL of standardized KMNO4 was consumed. Calculate the % Ca (W/w) of the milk sample analyzed. Express your
answer in 2 decimal places. No need to include the unit.
MM (g/mol): NazC204 = 134 ; Ca = 40.08
Pertinent redox reactions:
NazC204 + 2H30* → H2C204 + 2H20 + 2Na*
2Mno4 + 5H2C204 + 6H30* → 2MN2- + 10CO2 + 14H20
Caco3 + 2H30* → Ca2- + CO2 (g) + 3H2O
Ca2* + C2042 + H2O → CaC204+H2O(s)
CaC204+H2O(s) + 2H30* – Ca2* + H2C204+ H20
Round your answer to 2 decimal places.

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