source : yahoo.com
Which substance is the reducing agent in this reaction?
Express your answer as a chemical formula.?
you have to leave a space now and then. Else YA will “…” your text as you can see above
2 KMnO4 + 3 Na2SO3 + H2O → 2 MnO2 + 3 Na2SO4 + 2 KOH
.. “reduction”.. quite literally means “reduction in oxidation state”
.. “oxidation”.. means the opposite.. “increase in oxidation state”
.. “agents” are opposites
looking at the balanced equation.
.. all K, O, H and Na remained unchanged in oxidation states.. (you verify this!)
.. Mn went from +7 in KMnO4 to +4 in MnO4
.. S went form +4 in Na2SO3 to +6 in Na2SO4
.. Mn went from +7 to +4…. Mn was REDUCED and is the OXIDIZING AGENT
.. S went from +4 to +6.. . …S was OXIDIZED and is the REDUCING AGENT
.. SOME instructors would say “S” is the reducing agent
.. SOME instructors would say “Na2SO3” is the reducing agent
I would probably say “S”.. the avoid the arguments
. (1) Na2SO3 is an ionic solid.. it’s really the SO3(2-) what was oxidized
. (2) is it the Na2SO3 or the Na2SO4 that was “oxidized”.. reactant or product
….. .or is it the SO3(-2) or SO4(-2) that is the “reducing agent”?
by stating “S” is the reducing agent, you avoid all that stuff.. but in this case since your instructor stated.. “enter the formula”.. I’m guessing he or she is of the “the entire compound not just the S” clan.
final answer… . Na2SO3
Mohr's salt titration with KMnO4- Practical Experiment – So, the reaction between Mohr's salt and KMnO4 is a redox reaction in which oxidation and reduction takes place simultaneously. Potassium permanganate acts as self-indicator in this titration. Appearance of the end point can be detected by the colour change of KMnO4 from colourless to light…A reducing agent (also called a reductant or reducer) is an element or compound that loses (or "donates") an electron to an electron recipient (oxidizing agent) in a redox chemical reaction. A reducing agent is thus oxidized when it loses electrons in the redox reaction.13. Which substance is the reducing agent in the following reaction? e. An example of a good oxidizing agent is an alkali metal, such as Na. 16. Which of the following statements about electrochemical cells is true? a. Reduction occurs at the anode b. An element with a high love for…
Reducing agent – Wikipedia – Now the two half reactions can be combined just like two algebraic equations, with the arrow serving as the equals sign. The same species on opposite Unless otherwise noted, it does not matter if you add H2O or OH− as a source of O atoms, although a reaction may specify acidic solution or basic…Which substance is the reducing agent in this reaction? 2KMnO4 + 3Na2SO3 + H2O → 2MnO2 + 3Na2SO4 + 2KOH.Common Oxidizing Agents and Reducing Agents. In looking at oxidation-reduction reactions, we can focus on the role played by a particular reactant in a chemical reaction. Oxalic acid, on the other hand, is a reducing agent in this reaction. By giving up electrons, it reduces the MnO4- ion to Mn2+.
PDF Test4 ch19 Electrochemistry Practice-answers-Marked – The ion MnO4 is reduced toMnO2 and sulfur is oxidized to ion sulfate. Sulfite is the reducing agent. The reaction is the following: 4 KMnO4 + 4 KOH â†' 4 K2MnO4 + O2 + 2 2KMnO4 + 3H2SO4 = K2SO4 + 2MnSO4 + 3H2O + 2.5O2 (alkaline) and in other conditions…2KMnO4+3Na2SO3+H2O?2MnO2+3Na2SO4+2KOH.2MnO2 + 2H2SO4(конц.) = 2KMnO4 + 16HCl = 2MnCl2 + 2KCl + 5Cl2↑ + 8H2O. Ответ. Свернуть. 7) 3MnO2 + 4Al → 3Mn + 2Al2O3. Ответ. Свернуть.
GRAM EQUIVALENT WEIGHT – .