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Phosphorus Acid and Ions

Phosphorus Acid and Ions

Assessment

Interactive Video

Chemistry

9th - 10th Grade

Practice Problem

Hard

Created by

Amelia Wright

FREE Resource

The video tutorial explains how to write the formula for phosphorus acid (H3PO3) by analyzing its name and applying chemical naming rules. It highlights the absence of 'hydro' and 'ick' in the name, indicating the use of 'ous' and 'ite' rules. The tutorial details the formation of the phosphite ion (PO3 3-) and emphasizes the exception in phosphorus naming. It concludes by balancing the charges to derive the final formula, H3PO3.

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8 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is missing in the name 'phosphorus acid' that indicates it is not a binary acid?

The suffix 'ate'

The prefix 'hydro'

The suffix 'ous'

The prefix 'per'

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What suffix is used in the name of phosphorus acid that helps in identifying its type?

ic

ous

ite

ate

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

When writing the formula for phosphorus acid, what is the exception for the phosphorus stem?

Include 'or' in the stem

Change 'ous' to 'ate'

Exclude 'or' from the stem

Add 'hydro' prefix

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the formula for the phosphite ion?

PO4 3-

PO3 2-

PO3 3-

PO2 2-

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which ion table is used to identify the phosphite ion?

Periodic table

Common ion table

Solubility table

Activity series

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What charge does the hydrogen ion have in the formula for phosphorus acid?

0

+2

-1

+1

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many hydrogen ions are needed to balance the charge of the phosphite ion in phosphorus acid?

One

Two

Three

Four

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