Balancing Chemical Equations Concepts

Balancing Chemical Equations Concepts

Assessment

Interactive Video

Chemistry

9th - 10th Grade

Hard

Created by

Sophia Harris

FREE Resource

The video tutorial explains how to balance the chemical equation NH4OH + HCl yields NH4Cl + H2O. It begins by counting the atoms on both the reactant and product sides, ensuring that the number of each type of atom is equal on both sides. The tutorial highlights common mistakes, such as not counting all hydrogen atoms, and emphasizes the importance of obeying the law of conservation of mass. The equation is already balanced, demonstrating the process and confirming the balanced equation.

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7 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the first step in balancing the equation NH4OH + HCl → NH4Cl + H2O?

Count the atoms on the product side.

Identify the limiting reactant.

Add coefficients to balance the equation.

Count the atoms on the reactant side.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many hydrogen atoms are present on the reactant side of the equation?

Seven

Four

Five

Six

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is a common mistake people make when counting hydrogen atoms in this equation?

Not counting all hydrogen atoms

Ignoring nitrogen atoms

Miscounting chlorine atoms

Counting too many hydrogen atoms

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many hydrogen atoms are on the product side of the equation?

Four

Five

Six

Seven

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the total number of nitrogen atoms on each side of the equation?

Four

One

Two

Three

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which law is obeyed when the chemical equation is balanced?

Law of Conservation of Mass

Law of Multiple Proportions

Law of Constant Composition

Law of Definite Proportions

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the final conclusion about the equation NH4OH + HCl → NH4Cl + H2O?

It is balanced.

It needs more reactants.

It needs more products.

It is unbalanced.