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Chapter 2: Problem 88

Write the formula for each of the following compounds: a. chromium(VI) oxide b. disulfur dichloride c. nickel(II) fluoride d. potassium hydrogen phosphate e. aluminum nitride f. ammonia g. manganese(IV) sulfide h. sodium dichromate i. ammonium sulfite j. carbon tetraiodide

Short Answer

Expert verified
a. Cr2O3 b. S2Cl2 c. NiF2 d. K2HPO4 e. AlN f. NH3 g. MnS2 h. Na2Cr2O7 i. (NH4)2SO3 j. CI4

Step by step solution

01

Identify the ions

Chromium(VI) cation is Cr^6+ and oxide anion is O^2-.
02

Balance the charge

To balance charges, we require 3 oxide ions for two chromium ions: Cr2O3.
03

Write the formula

The formula of chromium(VI) oxide is Cr2O3. b. disulfur dichloride
04

Write the molecules

Two sulfur molecules (S2) and two chlorine molecules (Cl2)
05

Write the formula

The formula for disulfur dichloride is S2Cl2. c. nickel(II) fluoride
06

Identify the ions

Nickel(II) cation is Ni^2+ and fluoride anion is F^1-.
07

Balance the charge

To balance charges, we require 2 fluoride ions for one nickel ion: NiF2.
08

Write the formula

The formula of nickel(II) fluoride is NiF2. d. potassium hydrogen phosphate
09

Identify the ions

Potassium cation is K^1+, hydrogen phosphate anion is HPO4^2-.
10

Balance the charge

To balance charges, we require 2 potassium ions for one hydrogen phosphate ion: K2HPO4.
11

Write the formula

The formula of potassium hydrogen phosphate is K2HPO4. e. aluminum nitride
12

Identify the ions

Aluminum cation is Al^3+ and nitride anion is N^3-.
13

Balance the charge

The charges are balanced: AlN.
14

Write the formula

The formula of aluminum nitride is AlN. f. ammonia
15

Determine formula

Ammonia is NH3. g. manganese(IV) sulfide
16

Identify the ions

Manganese(IV) cation is Mn^4+ and sulfide anion is S^2-.
17

Balance the charge

To balance charges, we require 2 sulfide ions for one manganese ion: MnS2.
18

Write the formula

The formula of manganese(IV) sulfide is MnS2. h. sodium dichromate
19

Identify the ions

Sodium cation is Na^1+ and dichromate anion is Cr2O7^2-.
20

Balance the charge

To balance charges, we require 2 sodium ions for one dichromate ion: Na2Cr2O7.
21

Write the formula

The formula of sodium dichromate is Na2Cr2O7. i. ammonium sulfite
22

Identify the ions

Ammonium cation is NH4^+ and sulfite anion is SO3^2-.
23

Balance the charge

To balance charges, we require 2 ammonium ions for one sulfite ion: (NH4)2SO3.
24

Write the formula

The formula of ammonium sulfite is (NH4)2SO3. j. carbon tetraiodide
25

Determine formula

Carbon tetraiodide is CI4.

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