Chemical Equations and Polyatomic Ions

Chemical Equations and Polyatomic Ions

Assessment

Interactive Video

Chemistry

9th - 10th Grade

Hard

Created by

Emma Peterson

FREE Resource

The video tutorial explains how to balance the chemical equation for lead(II) nitrate and potassium sulfate. It begins by introducing the equation and counting the atoms on each side. The tutorial emphasizes the importance of recognizing polyatomic ions, such as nitrate and sulfate, which remain unchanged during reactions. The instructor demonstrates balancing the equation by adjusting coefficients, ensuring equal numbers of each type of atom on both sides. The video concludes with tips on simplifying the balancing process by treating polyatomic ions as single units when they appear on both sides of the equation.

Read more

7 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the chemical formula for lead(II) nitrate?

Pb(NO3)2

PbO

K2SO4

PbSO4

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is a polyatomic ion?

K

Pb

NO3

O

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many nitrate ions are present in the reactants of the given equation?

One

Two

Four

Three

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the first step in balancing the given chemical equation?

Balancing lead

Balancing potassium

Balancing sulfate

Balancing oxygen

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What coefficient is used to balance potassium in the equation?

3

2

4

1

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why is it easier to balance equations when polyatomic ions appear on both sides?

They are always balanced

They change during reactions

They can be counted as single units

They do not affect the equation

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Who is the presenter of the video?

Dr. A

Dr. B

Dr. C

Dr. D