Chemical Reactions and Balancing Equations

The video tutorial explains how to balance the chemical equation for chromium reacting with hydrochloric acid (Cr + HCl). It begins by counting the atoms on both sides of the equation, identifying the need to balance hydrogen and chlorine. By adding a coefficient of two in front of HCl, the equation is balanced, resulting in CrCl2 and H2 as products. The tutorial concludes by confirming the balanced equation and classifying it as a single displacement reaction.

What are the reactants in the chemical equation discussed in the video?

• NaCl and H2O

• H2O and O2

• CrCl2 and H2

• Cr and HCl

How many hydrogen atoms are present on the product side before balancing?

• Two

• Four

• Three

• One

What is the coefficient placed in front of HCl to balance the equation?

• 2

• 4

• 1

• 3

What type of chemical reaction is Cr + HCl yielding CrCl2 + H2?

• Double displacement

• Decomposition

• Single displacement

• Synthesis

After balancing, how many chlorine atoms are on each side of the equation?

• One

• Two

• Three

• Four