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Potassium Permanganate Is NOT a Primary Standard.Why

Question 18

Multiple Choice

Potassium permanganate is NOT a primary standard.Why?
I Solid KMnO4 contains traces of MnO2.
[ Potassium permanganate is NOT a primary standard.Why? I Solid KMnO<sub>4</sub> contains traces of MnO<sub>2</sub>. [ <sub>actual</sub>] < [ <sub>calculated</sub>] II Permanganate reacts with organic material in distilled water. [ <sub>actual</sub>] > [ <sub>calculated</sub>] III Permanganate is unstable in aqueous solution,producing MnO<sub>2</sub>,O<sub>2</sub>,and OH<sup>−</sup>. [ <sub>actual</sub>] < [ <sub>calculated</sub>] IV The presence of MnO<sub>2</sub>,Mn<sup>2+</sup>,heat,light,acids,and bases increase the rate of reaction between permanganate and water. [ <sub>actual</sub>] < [ <sub>calculated</sub>] A) I and II B) I,II,and IV C) II,III,and IV D) I,III,and IV E) I,II,and III actual] < [ Potassium permanganate is NOT a primary standard.Why? I Solid KMnO<sub>4</sub> contains traces of MnO<sub>2</sub>. [ <sub>actual</sub>] < [ <sub>calculated</sub>] II Permanganate reacts with organic material in distilled water. [ <sub>actual</sub>] > [ <sub>calculated</sub>] III Permanganate is unstable in aqueous solution,producing MnO<sub>2</sub>,O<sub>2</sub>,and OH<sup>−</sup>. [ <sub>actual</sub>] < [ <sub>calculated</sub>] IV The presence of MnO<sub>2</sub>,Mn<sup>2+</sup>,heat,light,acids,and bases increase the rate of reaction between permanganate and water. [ <sub>actual</sub>] < [ <sub>calculated</sub>] A) I and II B) I,II,and IV C) II,III,and IV D) I,III,and IV E) I,II,and III calculated]
II Permanganate reacts with organic material in distilled water.
[ Potassium permanganate is NOT a primary standard.Why? I Solid KMnO<sub>4</sub> contains traces of MnO<sub>2</sub>. [ <sub>actual</sub>] < [ <sub>calculated</sub>] II Permanganate reacts with organic material in distilled water. [ <sub>actual</sub>] > [ <sub>calculated</sub>] III Permanganate is unstable in aqueous solution,producing MnO<sub>2</sub>,O<sub>2</sub>,and OH<sup>−</sup>. [ <sub>actual</sub>] < [ <sub>calculated</sub>] IV The presence of MnO<sub>2</sub>,Mn<sup>2+</sup>,heat,light,acids,and bases increase the rate of reaction between permanganate and water. [ <sub>actual</sub>] < [ <sub>calculated</sub>] A) I and II B) I,II,and IV C) II,III,and IV D) I,III,and IV E) I,II,and III actual] > [ Potassium permanganate is NOT a primary standard.Why? I Solid KMnO<sub>4</sub> contains traces of MnO<sub>2</sub>. [ <sub>actual</sub>] < [ <sub>calculated</sub>] II Permanganate reacts with organic material in distilled water. [ <sub>actual</sub>] > [ <sub>calculated</sub>] III Permanganate is unstable in aqueous solution,producing MnO<sub>2</sub>,O<sub>2</sub>,and OH<sup>−</sup>. [ <sub>actual</sub>] < [ <sub>calculated</sub>] IV The presence of MnO<sub>2</sub>,Mn<sup>2+</sup>,heat,light,acids,and bases increase the rate of reaction between permanganate and water. [ <sub>actual</sub>] < [ <sub>calculated</sub>] A) I and II B) I,II,and IV C) II,III,and IV D) I,III,and IV E) I,II,and III calculated]
III Permanganate is unstable in aqueous solution,producing MnO2,O2,and OH−.
[ Potassium permanganate is NOT a primary standard.Why? I Solid KMnO<sub>4</sub> contains traces of MnO<sub>2</sub>. [ <sub>actual</sub>] < [ <sub>calculated</sub>] II Permanganate reacts with organic material in distilled water. [ <sub>actual</sub>] > [ <sub>calculated</sub>] III Permanganate is unstable in aqueous solution,producing MnO<sub>2</sub>,O<sub>2</sub>,and OH<sup>−</sup>. [ <sub>actual</sub>] < [ <sub>calculated</sub>] IV The presence of MnO<sub>2</sub>,Mn<sup>2+</sup>,heat,light,acids,and bases increase the rate of reaction between permanganate and water. [ <sub>actual</sub>] < [ <sub>calculated</sub>] A) I and II B) I,II,and IV C) II,III,and IV D) I,III,and IV E) I,II,and III actual] < [ Potassium permanganate is NOT a primary standard.Why? I Solid KMnO<sub>4</sub> contains traces of MnO<sub>2</sub>. [ <sub>actual</sub>] < [ <sub>calculated</sub>] II Permanganate reacts with organic material in distilled water. [ <sub>actual</sub>] > [ <sub>calculated</sub>] III Permanganate is unstable in aqueous solution,producing MnO<sub>2</sub>,O<sub>2</sub>,and OH<sup>−</sup>. [ <sub>actual</sub>] < [ <sub>calculated</sub>] IV The presence of MnO<sub>2</sub>,Mn<sup>2+</sup>,heat,light,acids,and bases increase the rate of reaction between permanganate and water. [ <sub>actual</sub>] < [ <sub>calculated</sub>] A) I and II B) I,II,and IV C) II,III,and IV D) I,III,and IV E) I,II,and III calculated]
IV The presence of MnO2,Mn2+,heat,light,acids,and bases increase the rate of reaction between permanganate and water.
[ Potassium permanganate is NOT a primary standard.Why? I Solid KMnO<sub>4</sub> contains traces of MnO<sub>2</sub>. [ <sub>actual</sub>] < [ <sub>calculated</sub>] II Permanganate reacts with organic material in distilled water. [ <sub>actual</sub>] > [ <sub>calculated</sub>] III Permanganate is unstable in aqueous solution,producing MnO<sub>2</sub>,O<sub>2</sub>,and OH<sup>−</sup>. [ <sub>actual</sub>] < [ <sub>calculated</sub>] IV The presence of MnO<sub>2</sub>,Mn<sup>2+</sup>,heat,light,acids,and bases increase the rate of reaction between permanganate and water. [ <sub>actual</sub>] < [ <sub>calculated</sub>] A) I and II B) I,II,and IV C) II,III,and IV D) I,III,and IV E) I,II,and III actual] < [ Potassium permanganate is NOT a primary standard.Why? I Solid KMnO<sub>4</sub> contains traces of MnO<sub>2</sub>. [ <sub>actual</sub>] < [ <sub>calculated</sub>] II Permanganate reacts with organic material in distilled water. [ <sub>actual</sub>] > [ <sub>calculated</sub>] III Permanganate is unstable in aqueous solution,producing MnO<sub>2</sub>,O<sub>2</sub>,and OH<sup>−</sup>. [ <sub>actual</sub>] < [ <sub>calculated</sub>] IV The presence of MnO<sub>2</sub>,Mn<sup>2+</sup>,heat,light,acids,and bases increase the rate of reaction between permanganate and water. [ <sub>actual</sub>] < [ <sub>calculated</sub>] A) I and II B) I,II,and IV C) II,III,and IV D) I,III,and IV E) I,II,and III calculated]


A) I and II
B) I,II,and IV
C) II,III,and IV
D) I,III,and IV
E) I,II,and III

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