Rx
Reactions

Redox

Electron transfer reactions including displacement, strong oxidizers (KMnO₄, K₂Cr₂O₇, HNO₃), disproportionation, comproportionation, thermal decomposition, and electrolysis.

50 questions total

oxidizer(25)

1999gMedium

A mixture of acidified potassium dichromate and ethanol is heated.

2001dMedium

A tin(II) chloride solution is added to an acidic solution of potassium dichromate.

2002aMedium

Concentrated hydrochloric acid is added to solid manganese(IV) oxide.

2002dMedium

A piece of copper metal is added to a solution of dilute nitric acid.

2002fMedium

2-butanol is heated with a solution of acidified potassium dichromate.

2003cMedium

Acidic solutions of potassium dichromate and iron(II) chloride are mixed.

2004aMedium

Concentrated nitric acid is added to iron(II) sulfide.

2005bMedium

An aqueous solution of potassium triiodide is added to a solution of sodium thiosulfate.

2005fMedium

Ethanol is warmed gently with acidified potassium dichromate.

2006bMedium

Acidified solutions of cerium(IV) and iron(II) are mixed.

2007cMedium

Sodium sulfite is added to a neutral potassium permanganate solution.

2009dMedium

An acidic potassium permanganate solution is added to a solution of sodium sulfite.

2010dMedium

An acidified potassium dichromate solution is added to a tin(II) chloride solution.

2012bMedium

Sodium iodide solution is added to a hydrogen peroxide solution.

2013bMedium

Solutions of sodium oxalate and acidified potassium permanganate are mixed.

2015dMedium

Solutions of hydriodic acid and hydrogen peroxide are mixed.

2016aHard

A strip of copper metal is heated strongly with concentrated sulfuric acid.

2018dMedium

A mixture of manganese(IV) oxide and concentrated hydrochloric acid is heated.

2019dMedium

Solid copper(II) sulfate is added to a potassium iodide solution.

2021bMedium

Acidic aqueous solutions of potassium permanganate and iron(II) sulfate are mixed.

2022bMedium

Sulfur dioxide is bubbled through an acidified solution of potassium permanganate.

2022eMedium

1-Butanol reacts with an acidified solution of potassium dichromate.

2024cMedium

Manganese(IV) oxide is added to concentrated aqueous hydrochloric acid.

2025bMedium

Potassium permanganate is mixed with iron(II) sulfate in dilute sulfuric acid.

2025dHard

Phosphorus trichloride reacts with potassium chlorate.