Chemistry 9th Edition

Published by Cengage Learning
ISBN 10: 1133611095
ISBN 13: 978-1-13361-109-7

Chapter 4 - Types of Chemical Reactions and Solution Stoichiometry - Exercises: 24

Answer

i. d. Magnesium sulfate ii. b. Sodium chloride iii. c. Potassium carbonate iv. a. Barium nitrate Picture ii. None of these pictures are a good representation of $HC_2H_3O_2$ because $HC_2H_3O_2$ is a weak acid.

Work Step by Step

i. Magnesium has an ionic charge of 2+ and sulfate has an ionic charge of 2-. Therefore, magnesium sulfate best fits picture i. ii. Sodium has an ionic charge of 1+ and chloride has an ionic charge of 1-. Therefore, sodium chloride best fits picture ii. iii. Potassium has an ionic charge of 1+ and carbonate has an ionic charge of 2-. Therefore, potassium carbonate best fits picture iii. iv. Barium has an ionic charge of 2+ and nitrate has an ionic charge of 1-. Therefore barium nitrate best fits picture iv. Picture ii. best fits $HNO_3$ as H has an ionic charge of +1 and $NO_3$ has an ionic charge of 1-. None of these pictures are a good representation of $HC_2H_3O_2$ because $HC_2H_3O_2$ is a weak acid which only partially dissociates into its ions. Therefore, a correct image would have few ions and mostly compounds. However, each of the pictures only depict ions in solution.
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