Balancing Chemical Reactions and Charges

The video tutorial explains how to balance the chemical equation for the reaction between calcium and bromine gas to form calcium bromide. It begins by counting the atoms on each side of the equation to ensure they are equal, confirming the equation is balanced. The tutorial then delves into the ionic charges of calcium and bromine, explaining how calcium forms a 2+ ion and bromine forms a 1- ion, resulting in the neutral compound calcium bromide (CaBr2). The video concludes with a summary of the balanced equation and a thank you to viewers.

What is the balanced chemical equation for the reaction between calcium and bromine gas?

• Ca + Br2 → CaBr

• Ca + Br2 → CaBr2

• Ca2 + Br2 → CaBr2

• Ca + 2Br → CaBr2

How many bromine atoms are present on each side of the balanced equation?

• One bromine atom

• Two bromine atoms

• Three bromine atoms

• Four bromine atoms

What ionic charge does calcium form in the reaction?

• Two minus

• One plus

• One minus

• Two plus

What is the ionic charge of the bromide ion?

• One plus

• One minus

• Two plus

• Two minus

What is the net charge of the compound formed in the reaction?

• One plus

• Zero

• One minus

• Two minus