Question

1. which of the following sets of coefficients will balance the reaction below?____ nabr + __ caf₂ → __ naf + ____ cabr₂a) 4, 2, 4b) 1, 2, 1, 2c) 2, 3, 1, 2d) 2, 1, 2, 13. what does the arrow in a chemical reaction represent?a) yieldsb) reacts to producec) combines to formd) all of the above

Explanation:

Step1: Balance the chemical equation

For the reaction \( \text{NaBr}+\text{CaF}_{2}\to\text{NaF}+\text{CaBr}_{2} \), we check the number of each element on both sides.

• Sodium (\(Na\)): Let the coefficient of \(NaBr\) be \(a\) and of \(NaF\) be \(b\).
• Calcium (\(Ca\)): Let the coefficient of \(CaF_{2}\) be \(c\) and of \(CaBr_{2}\) be \(d\).
• Bromine (\(Br\)): From \(NaBr\) and \(CaBr_{2}\), we have \(a = 2d\).
• Fluorine (\(F\)): From \(CaF_{2}\) and \(NaF\), we have \(2c=b\).
• Calcium (\(Ca\)): \(c = d\).

If we take \(d = 1\), then \(a=2\), \(c = 1\), \(b = 2\).

Answer:

D. \(2,1,2,1\)