Respuesta :

A balanced chemical equation for the standard formation reaction of solid potassium dichromate is;
K₂Cr₂O₇→K⁺(s) + KCr₂O₇⁻(s)
Potassium dichromate with a chemical formula K₂Cr₂O₇ with molar mass 294.185 g/mol, is a common inorganic chemical reagent and its common use is as an oxidizing agent. It is odorless and its appearance is red-orange crystalline solid.
crimsonrose1996

Answer:

7/2 O2(g)+2K(s)+2Cr(s)=K2Cr2O7(s)

Explanation:  

1.) Identify the elements: potassium dichromate contains oxygen, potassium, and chromium.

2.) Identify the standard states of each element: the standard state of oxygen is O2(g), the standard state of potassium is K(s), and the standard state of chromium is Cr(s).

3.)Write and balance the formation:

a. written out: O2(g)+ K(s)+Cr(s)=K2Cr2O7

b. Balanced: 7O2(g)+4K(s)+4Cr=2K2Cr2O7

4.) Make sure there is only 1 Mol of the compound, you have to divide everything by 2, this gives you the following:

7/2 O2(g)+ 2K(s)+2Cr(s)=K2Cr2O7

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The 7/2 on the oxygen make it so you can balance without making more than 1 mol of the compound. Hope this helps!

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