how to write a conversion factor that relates moles of HCL to moles of NiCO3 to the reaction of hydrochloric acid reacts with some reacts with solid nickel carbonate

Question

Chemistry

Mona

13 June, 09:57

how to write a conversion factor that relates moles of HCL to moles of NiCO3 to the reaction of hydrochloric acid reacts with some reacts with solid nickel carbonate

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Lea Wagner · Answer 1

See below.

Step-by-step explanation:

We call this conversion factor the molar ratio.

1. Start with the balanced equation

NiCO₃ + 2HCl ⟶ NiCl₂ + H₂O + CO₂

2. Note the coefficients of the substances

The equation tells you that 1 mol of NiCO₃ reacts with 2 mol of HCl·

Thus, the conversion factor is either (1 mol NiCO₃/2 mol HCl) or (2 mol HCl/1 mol NiCO₃).

You choose the one that gives the correct units for the answer.

For example, if the question was, "How many moles of HCl will react with x mol of NiCO₃," you would write

x mol NiCO₃ * (2 mol HCl/1 mol NiCO₃) ⟶ 2x mol HCl

Notice that putting "mol HCl" in the numerator and "mol NiCO₃" in the denominator cancels "mol NiCO₃" and gives you the desired units of "mol HCl" in the answer.