Balancing Redox Reactions Concepts

Balancing Redox Reactions Concepts

Assessment

Interactive Video

Chemistry

10th - 12th Grade

Hard

Created by

Liam Anderson

FREE Resource

The video tutorial explains how to balance a redox reaction involving Cr2O7 2- and Fe2+ using the ion-electron method in an acidic medium. It covers writing oxidation numbers, identifying half reactions, and balancing atoms and charges. The tutorial demonstrates balancing oxygen with water, hydrogen with H+ ions, and charges with electrons. It concludes with simplifying the equation and verifying the balance of charges and atoms.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the first step in balancing a redox reaction using the ion-electron method?

Balance the charges

Write the oxidation numbers for each element

Identify the products

Add water molecules

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In a redox reaction, what does it mean if an element's oxidation number decreases?

The element is oxidized

The element is reduced

The element gains protons

The element loses protons

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How do you balance oxygen atoms in a redox reaction?

By adding more reactants

By adding water molecules

By adding electrons

By adding H+ ions

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is added to balance hydrogen atoms in an acidic medium?

Electrons

OH- ions

H+ ions

Water molecules

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How do you balance the charge in a redox reaction?

By adding more reactants

By adding electrons

By adding H+ ions

By adding water molecules

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the purpose of multiplying the half-reactions by a common factor?

To balance the number of protons

To balance the number of molecules

To balance the number of electrons

To balance the number of atoms

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What should be equal on both sides of a balanced redox reaction?

The number of electrons only

The number of protons

The charge and number of atoms

The number of molecules

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