Zn + HNO₂ + Zn (NO3)₂ + No+ H₂O
Answers
The unbalanced redox equation is as follows:
Zn+HNO3→4Zn(NO3)2+N2O+H2O
Balance all atoms other than H and O.
4Zn+10HNO3→4Zn(NO3)2+N2O+H2O
The oxidation number of Zn changes from 0 to +2. The change in the oxidation number of one Zn atom is +2. For 4 Zn atoms, the total change in the oxidation number is 8.
The oxidation number of N changes from +5 to +1. The change in the oxidation number of one N atom is 4. For 2 N atoms, the total change in the oxidation number is 8.
The increase in the oxidation number is balanced with a decrease in the oxidation number O atoms are balanced adding 4 water molecules on RHS.
4Zn+10HNO3→4Zn(NO3)2+N2O+5H2O
Hydrogen atoms are balanced.
This is the balanced chemical equation
Explanation:
This is an oxidation-reduction (redox) reaction:
Zn0 - 2 e- → ZnII
(oxidation)
2 NV + 2 e- → 2 NIV
(reduction)
Zn is a reducing agent, HNO3 is an oxidizing agent.
Reactants:
Zn
Names: Zinc source: wikidata, accessed: 2019-09-07, Zinc powder (pyrophoric) source: ICSC, accessed: 2019-09-04, Zn source: wikidata, accessed: 2019-09-07... show more
Appearance: Grey-to-blue powder source: ICSC, accessed: 2019-09-04
HNO3 – Nitric acid source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: NIOSH NPG, accessed: 2019-09-02
Other names: Aqua fortis source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: NIOSH NPG, accessed: 2019-09-02, Spirit of niter source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02, Eau forte source: wikipedia, accessed: 2019-09-27... show more
Appearance: Colorless, yellow or red fuming liquid source: wikipedia, accessed: 2019-09-27; Colourless-to-yellow liquid with pungent odour source: ICSC, accessed: 2019-09-04; Colorless, yellow, or red, fuming liquid with an acrid, suffocating odor. [Note: Often used in an aqueous solution. Fuming nitric acid is concentrated nitric acid that contains dissolved nitrogen dioxide.] source: NIOSH NPG, accessed: 2019-09-02
Products:
Zn(NO3)2 – Zinc nitrate source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04
Other names: Zinc dinitrate source: wikipedia, accessed: 2019-09-27source: ICSC, accessed: 2019-09-04, Zinc(II) nitrate source: wikidata, accessed: 2019-09-02, Nitric acid, zinc salt source: ICSC, accessed: 2019-09-04
Appearance: Colorless, deliquescent crystals source: wikipedia, accessed: 2019-09-27; Colourless crystals or powder source: ICSC, accessed: 2019-09-04
NO2 – Nitrogen dioxide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02
Other names: Nitrogen(IV) oxide source: wikipedia, accessed: 2019-09-27, Deutoxide of nitrogen source: wikipedia, accessed: 2019-09-27, Nitrogen peroxide source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02... show more
Appearance: Brown gas source: wikipedia, accessed: 2019-09-27; Reddish-brown gas or brown or yellow liquid with pungent odour source: ICSC, accessed: 2019-09-04; Yellowish-brown liquid or reddish-brown gas (above 70°F) with a pungent, acrid odor. [Note: In solid form (below 15°F) it is found structurally as N2O4.] source: NIOSH NPG, accessed: 2019-09-02
H2O – Water, oxidane source: wikipedia, accessed: 2019-09-27
Other names: Water (H2O) source: wikipedia, accessed: 2019-09-27, Hydrogen hydroxide (HH or HOH) source: wikipedia, accessed: 2019-09-27, Hydrogen oxide source: wikipedia, accessed: 2019-09-27... show more
Appearance: White crystalline solid, almost colorless liquid with a hint of blue, colorless gas source: wikipedia, accessed: 2019-09-27
Search by reactants (Zn, HNO3)
1234567
1 HNO3 + Zn → H2O + NH4NO3 + Zn(NO3)2
2 HNO3 + Zn → H2O + NO + Zn(NO3)2
3 HNO3 + Zn → H2O + N2O + Zn(NO3)2
4 HNO3 + Zn → H2O + NO2 + Zn(NO3)2
5 HNO3 + Zn → H2O + N2 + Zn(NO3)2
6 H2SO4 + HNO3 + Zn → H2O + ZnSO4 + N2O
7 HNO3 + Zn → H2O + NH3 + Zn(NO3)2
8 HNO3 + Zn → H2 + Zn(NO3)2
9 HNO3 + Zn → H2O + Zn(NO3)2 + (NH4)(NO3)
10 HNO3 + Zn → H2O + NH4NO3 + Zn[NO3]2
1234567
Search by products (Zn(NO3)2, NO2, H2O)
1 HNO3 + Zn → H2O + NO2 + Zn(NO3)2
2 HNO3 + Zn → H2O + NO2 + NH4NO3 + Zn(NO3)2
3 HNO3 + Zn → H2O + NO + NO2 + Zn(NO3)2
4 HNO3 + ZnS → H2O + H2SO4 + NO2 + Zn(NO3)2
Search by reactants (Zn, HNO3) and by products (Zn(NO3)2, NO2, H2O)
1 HNO3 + Zn → H2O + NO2 + Zn(NO3)2
2 HNO3 + Zn → H2O + NO2 + NH4NO3 + Zn(NO3)2
3 HNO3 + Zn → H2O + NO + NO2 + Zn(NO3)2