Help with products of reactions

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Discussion Overview

The discussion revolves around identifying the products of various chemical reactions, including those involving zinc sulfate and sodium hypochlorite, manganese (II) sulfate and sodium periodate, and the reactions of sodium phosphites and phosphates with ammonium molybdate. Participants explore potential reaction equations and the behavior of reactants in solution.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested
  • Mathematical reasoning

Main Points Raised

  • One participant suggests that the reaction of ZnSO4 with NaClO is a double displacement, proposing the equation Zn(ClO)2 + Na2SO4, but questions the presence of Cl- ions, indicating a possible oxidation of sulfate.
  • Another participant notes that hypochlorates can hydrolyze slowly, producing Cl- and O2, and expresses uncertainty about the initial reaction.
  • Regarding the manganese (II) sulfate and sodium periodate reaction, one participant proposes the equation 2MnSO4 + NaIO4 + 3 H2O --> 2 HMnO4 + NaIO3 + 2 H2SO4, while another questions the balancing of oxygen in this equation.
  • Several participants mention the disproportionation of ClO- in solution, producing ClO3- and Cl-, with one referencing a textbook for support.
  • There is a correction regarding the coefficients in the proposed manganese reaction, indicating a need for adjustment.

Areas of Agreement / Disagreement

Participants express differing views on the reactions and their products, with no consensus reached on the correct equations or the behavior of the reactants. The discussion remains unresolved with multiple competing hypotheses.

Contextual Notes

Participants note limitations in their understanding, including uncertainty about the presence of Cl- ions in the initial reaction and the balancing of oxygen in the manganese reaction. There are also references to conflicting information regarding molybdate formulas.

pariswhitney
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Hello; thank you in advance for anyone who would like to help:
I am looking for the products of these reactions:

ZnSO4 + NaClO -->
I thought it was just a double displacement, which would make my reaction equation:
Zn(ClO)2 + Na2SO4
but a test with silver nitrate was positive for Cl- ions, so that has to be somewhere in the products. Is it possible that the ClO oxidizes the sulfate or something; i know that sulfite becomes oxidized to sulfate, but I am kind of stuck.

also:


what happens when manganese (II) sulfate is added to a solution of aqueous sodium periodate (meta) in a bit of acid (phosphoric). A pink colour was observed, but what is the reaction equation?
I was thinking:
MnSO4 + 2 NaIO4 --> Mn(IO4)2 (is that pink) + Na2SO4

Lastly, what happens to NaH2PO2, Na2HPO3, and Na2HPO4, when they are added to an ammonium molybdate solution, heated, and then have 4M sulfuric acid added. (ie what are the reacton equations). The observed products were blue liquid, white precipitate, and yellow precipitate respectively. I keep finding conflicting info as to the formula for molybdate; so I am kind of stumped.

Thanks everyone
 
Last edited:
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1st - I can't see any obvious reaction, however, I will check whether there were no Cl- ions in substrates. Hypochlorates hydrolyse slowly producing Cl- and O2.

2nd - IMHO pink stands for MnO4-.


Chemical calculators for labs and education
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Thank you; for the first one, I also found that ClO- disproportionates in solution giving ClO3- and Cl-

I have also worked out what I think is the periodate/manganese sulfate reaction:

2MnSO4 + NaIO4 + 3 H20 --> 2 HMnO4 + NaIO3 + 2 H2SO4; does this look alright?
 
pariswhitney said:
Thank you; for the first one, I also found that ClO- disproportionates in solution giving ClO3- and Cl-

Never heard about it. O2 (or more precisely atomic O) is the reactive substance in the bleach.

2MnSO4 + NaIO4 + 3 H20 --> 2 HMnO4 + NaIO3 + 2 H2SO4; does this look alright?

Oxygen is not balanced properly.


Chemical calculators for labs and education
BATE - pH calculations, titration curves, hydrolisis
 
I also found that ClO- disproportionates in solution giving ClO3- and Cl-

I found this in a book called Vogel's Textbook of Macro and Semimicro Qualitative Inorganic Analysis.

Oxygen is not balanced properly.
Oops. I have 5's in front of the NaIO4 and the NaIO3
 

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