Question

what coefficients are needed to balance the chemical equation? nabr + caf2 → naf + cabr2 a 1,1,1,1 b 1,2,1,2 c 1,2,2,1 d 2,1,2,1

Explanation:

Step1: Balance sodium (Na)

On the left - hand side, we have 1 Na in NaBr, and on the right - hand side, 1 Na in NaF. For the equation to be balanced in terms of Na, we don't need to change the coefficients for the sodium - containing compounds for now.

Step2: Balance bromine (Br)

There is 1 Br in NaBr on the left and 2 Br in CaBr₂ on the right. To balance Br, we put a 2 in front of NaBr: 2NaBr + CaF₂ → NaF+CaBr₂.

Step3: Balance fluorine (F)

There are 2 F in CaF₂ on the left and 1 F in NaF on the right. To balance F, we put a 2 in front of NaF: 2NaBr + CaF₂ → 2NaF+CaBr₂.
The balanced equation has coefficients 2, 1, 2, 1.

Answer:

B. 2,1,2,1