Balancing Chemical Equations and Nitrate Ions

Balancing Chemical Equations and Nitrate Ions

Assessment

Interactive Video

Chemistry

9th - 10th Grade

Hard

Created by

Emma Peterson

FREE Resource

In this video, Dr. B demonstrates how to balance the chemical equation CuO + HNO3, involving copper(II) oxide and nitric acid. The process includes counting atoms, recognizing the nitrate ion as a polyatomic ion, and using it to simplify balancing. By adjusting coefficients, the equation is balanced, ensuring equal numbers of each type of atom on both sides. The video emphasizes the importance of treating the nitrate ion as a single unit to simplify the balancing process.

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8 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

Cu and NO3

Cu and H2O

CuO and HNO3

CuO and H2

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the significance of the nitrate ion in the equation?

It remains unchanged and is treated as a single unit.

It changes into a different ion during the reaction.

It breaks down into separate atoms.

It is not involved in the reaction.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

Three

Four

Two

One

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What adjustment is made to balance the hydrogen atoms in the equation?

Add a coefficient of 3 in front of CuO

Add a coefficient of 2 in front of CuO

Add a coefficient of 2 in front of HNO3

Add a coefficient of 3 in front of HNO3

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many nitrate ions are present on the product side after balancing?

Four

Three

One

Two

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the final balanced equation for the reaction?

CuO + 2HNO3 → Cu(NO3) + H2O

CuO + HNO3 → Cu(NO3)2 + H2O

CuO + 2HNO3 → Cu(NO3)2 + H2O

CuO + HNO3 → Cu(NO3) + H2O

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why is it easier to balance the equation by treating the nitrate group as a single entity?

It reduces the number of atoms to count.

It simplifies the balancing process.

It increases the reaction rate.

It changes the chemical properties.

8.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Who is the presenter of the video?

Dr. B

Dr. D

Dr. A

Dr. C