Question

Balance the following equation: Nb + HNO, ----> Nb(NO3)+ N,0 + H20 9. Write the correct chemical formulas and balance the following equations: A. Potassium iodide plus calcium arsenate yields calcium iodide plus potassium arsenate.

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Answer 1

To calculate balanced chemical equation,

It works on the law of conservation of mass. The number of atoms in the elements on the reactant side must be equal to the product side.

In question 1.

Nb + HNO_{​​​​3}$\rightarrow$ Nb(NO_{​​​​​3})₃ + N_{​​​​​​2}O + H_{​​​​2}O

Answer.

8 Nb + 30 HNO_{​​​​3}$\rightarrow$ 8 Nb(NO_{​​​​​3})₃ + 3 N_{​​​​​​2}O + 15 H_{​​​​​​2}O

Now, by putting these values. Number of atoms on the elements on the both sides are equal.

Question 2.

Chemical formulas

Potassium Iodide = KI

Calcium arsenate = Ca_{​​​​​3}(AsO_{​​​​4})₂

Calcium Iodide = CaI_{​​​​2}

Potassium arsenate = K_{​​​​​​3}​​​​​AsO_​​4

Balanced chemical equation with the same concept as written in the first question is given below.

6 KI + Ca_{​​​​​3}(AsO_{​​​​4})₂ = 3 CaI_{​​​​2} + 2 K₃​AsO_​​4