CHEM 1070 Chapter Notes - Chapter 7: Ionic Compound, Chemical Equation, Electrolyte

48 views3 pages

coralwater-buffalo219

27 Sep 2016

School

Department

Course

Professor

For unlimited access to Textbook Notes, a Class+ subscription is required.

Document Summary

Chemical reaction: the transformation of one or more substances into different substances. Combustion reactions: reactions where a substance reacts with oxygen, emitting heat and forming one or more oxygen containing compounds. Oxidation-reduction reactions: reactions in which electrons are transferred from one substance to another. Signs of a chemical reaction: color changes, formation of solid or gas, heat absorption/emission, light emission. Balanced equation: a chemical equation in which the numbers of each type of atom on both sides of the equation are equal. To balance an equation only change the coefficients, never change the subscripts because that changes the kinds of molecules, not the number. Aqueous solution: a homogeneous mixture of a substance with water. Strong electrolyte solutions: a solution containing a solute that dissociates into ions; therefore, a solution that conducts electricity well. Precipitation reaction: a reaction that forms a solid or precipitate when two aqueous solutions are mixed.

Related Questions

One of these answer choices are in the wrong place. Please indicate which is incorrect. Again, 5 out of 6 are correct. Only 1 is wrong. I'm 90% sure one of the answers in the "false" category are misplaced.

Thank you!

The Behavior of Substances in Water

Part 1:

Ammonia, NH₃, is a weak electrolyte. It forms ions in solution by reacting with water molecules to form the ammonium ion and hydroxide ion. Write the balanced chemical reaction for this process, including state symbols.
From everyday experience, you are probably aware that table sugar (sucrose), C₁₂H₂₂O₁₁, is soluble in water. When sucrose dissolves in water, it doesn’t form ions through any reaction with water. It just dissolves without forming ions, so it is a nonelectrolyte. Write the chemical equation for the dissolving of sucrose in water.
Both NH₃ and C₁₂H₂₂O₁₁ are soluble molecular compounds, yet they behave differently in an aqueous solution. Briefly explain why one is a weak electrolyte and the other is a nonelectrolyte.
Hydrochloric acid, HCl, is a molecular compound that is a strong electrolyte. Write the chemical reaction of HCl with water.
Compare the ammonia reaction with that of hydrochloric acid. Why are both of these substances considered electrolytes?
Explain why HCl is a strong electrolyte and ammonia is a weak electrolyte.
Classify each of the following substances as either ionic or molecular:

KCl
NH₃
CO₂
MgBr₂
HCl
Ca(OH)₂
PbS
HC₂H₃O₂

For those compounds above that, you classified as ionic, use the solubility rules to determine which are soluble.
The majority of ionic substances are solids at room temperature. Describe what you would observe if you placed a soluble ionic compound and an insoluble ionic compound in separate beakers of water.
Write the chemical equation(s), including state symbols, for what happens when each soluble ionic compound that you identified above is placed in water. Are these substances reacting with water when they are added to water?
How would you classify the soluble ionic compounds: strong electrolyte, weak electrolyte, or nonelectrolyte? Explain your answer.
Sodium chloride, NaCl, is a strong electrolyte, as is hydroiodic acid, HI. Write the chemical equations for what happens when these substances are added to water. m
Are NaCl and HI strong electrolytes because they have similar behavior in an aqueous solution? If not, describe, using words and equations, the different chemical process that takes place in each case.

Part 2:

You have two hypothetical molecular compounds, AX and AY. AX is a strong electrolyte and AY is a weak electrolyte. The compounds undergo the following chemical reactions when added to water.

AX (aq) + H₂O (l) → AH₂O⁺ (aq) + X⁻ (aq)

AY (aq) + H₂O (l) → AH₂O⁺ (aq) + Y⁻ (aq)

Explain how the relative amounts of AX ( aq ) and AY ( aq ) would compare if you had a beaker of water with AX and a beaker of water with AY.
How would the relative amounts of X⁻ ( aq) and Y⁻ ( aq) in the two beakers compare? Be sure to explain your answer.

indigolouse566

CHEM 1070 Chapter Notes - Chapter 7: Ionic Compound, Chemical Equation, Electrolyte

Document Summary

Get access

Related textbook solutions

Chemistry: Structure and Properties

Basic Chemistry

Principles of Chemistry Molecular Approach

Chemistry: Structure and Properties

Principles of Chemistry Molecular Approach

Chemistry: A Molecular Approach

Chemistry: A Molecular Approach

Principles of Chemistry: A Molecular Approach

Chemistry: The Central Science

Related Documents

CHEM 1070 Study Guide - Final Guide: Heat Capacity, Chemical Equation, Chemical Formula

CHEM 1122 Study Guide - Quiz Guide: Honda H Engine, Billiard Ball, Kinetic Theory Of Gases

CHEM 1122 Lecture Notes - Lecture 5: Ion, Spectator Ion, Nonmetal

Related Questions