Use the pull -down boxes to specify states such as (an) or (s). If a box is not

Question

Use the pull -down boxes to specify states such as (an) or (s). If a box is not needed leave it blank. If no reaction occurs leave all boxes blank and click on Submit. Write a net ionic equation for the reaction that occurs when excess nitric acid (aq) and calcium carbonate (a) are combined. Use the pull-down boxes to specify states such as (aq) or (s). If a box is not needed leave it blank. If no reaction occurs leave all boxes blank and click on Submit. Write a net ionic equation for the reaction that occurs when excess hydrolodlc arid and potassium sulfide are combined. Identify, the species oxidized. the species reduced. the oxidizing agent and the reducing agent in the following electron transfer reaction. As the reaction proceeds. electrons are transferred from to In the above redox reaction. use oxidation numbers to identify the element oxidized. the element reduced. the oxidizing agent and the reducing agent. name of the clement name of the element oxidized: reduced: formula of the oxidizing agent: formula of the reducing agent: Identity the species oxidized. the species reduced. the oxidizing agent and the reducing agent in the following electron transfer reaction. oxidizing agent reducing agent As the reaction proceeds. electrons are transferred from to

Explanation / Answer

Calcium carbonate and nitric acid

CaCO3(s) + 2 H+(aq) --> Ca2+(aq) + H2O(l) + CO2(g)

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Hydrochloric acid and potassium sulfide:

2 H+(aq) + S2-(aq) ---> H2S(g)

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Species oxidized: Zn

Species reduced: Cu+2

Oxidizing agent: Cu+2

Reducing agent: Zn

Electrons transferred from Zn to Cu+2

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In the reaction, oxidation number of Nitrogen changes from -1 to -2.
So, Nitrogen gets rediced.

and oxidation number of Phosphorus changes from +2 to +7. It is oxidized.

Element which oxidized: P (Phosphorus)

Element which reduced: N (Nitrogen)

Oxidizing agent: NH2OH

Reducing agent: H2PO2-

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Species oxidized: Zn

Species reduced: Fe

Oxidizing agent: Fe

Reducing agentL Zn

electrons transferred from Zn to Fe

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