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Chapter 8: Problem 8

Write the symbol used in a chemical equation to represent each of the following: $$\begin{array}{l}{\text { a. an aqueous solution }} \\ {\text { b. heated }} \\\ {\text { c. a reversible reaction }} \\ {\text { d. a solid }} \\ {\text { e. at a temperature of } 25^{\circ} \mathrm{C}}\end{array}$$

Short Answer

Expert verified
The symbols used in a chemical equation are as follows: (aq) for an aqueous solution; \(\Delta\) for heating; \(\rightleftharpoons\) for a reversible reaction; (s) for a solid substance; and \(25^\circ C\) for a temperature specification of 25 degrees celsius.

Step by step solution

01

Symbol for An Aqueous Solution

An aqueous solution in a chemical equation is represented by (aq) written in parenthesis after the chemical formula. This indicates that the substance is dissolved in water.
02

Symbol for Heated

The process of heating in a chemical equation is depicted by the Greek letter delta \(\Delta\), often placed above the arrow in the equation. This symbolizes that heat is being applied to the reactants.
03

Symbol for A Reversible Reaction

A reversible reaction is usually represented by double arrows in opposite directions \(\rightleftharpoons\). It means that the reaction can proceed both in the forward and reverse directions.
04

Symbol for A Solid

A solid substance in a chemical equation is represented by (s) written in parentheses after the chemical formula. It denotes that the substance is in solid state.
05

Symbol for A Specific Temperature

When a particular temperature is specified for a reaction, it is generally written above or below the yield sign or arrow in the equation. Here, for a temperature of 25 degree celsius, it would be written as \(25^\circ C\).

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Most popular questions from this chapter

Write and balance each of the following equations, and then identify each equation by type. $$ \begin{array}{c}{\text { a. hydrogen }+\text { iodine } \rightarrow \text { hydrogen iodide }} \\ {\text { b. lithium + water } \longrightarrow} \\\ {\text { lithium hydroxide + hydrogen }} \\ {\text { c. mercury(II) oxide } \longrightarrow \text { mercury + oxygen }} \\ {\text { d. copper + chlorine } \rightarrow \text { copper(II) chloride }}\end{array} $$

Predict the products and write a net ionic equation for each of the following reactions. If no reaction occurs, write "no reaction." $$ \begin{array}{l}{\text { a. } \mathrm{K}_{2} \mathrm{CO}_{3}(a q)+\mathrm{CaCl}_{2}(a q) \longrightarrow} \\ {\text { b. } \mathrm{Na}_{2} \mathrm{SO}_{4}(a q)+\mathrm{AgNO}_{3}(a q) \rightarrow} \\ {\text { c. } \mathrm{NH}_{4} \mathrm{Cl}(a q)+\mathrm{AgNO}_{3}(a q) \rightarrow} \\\ {\text { d. } \mathrm{Pb}(s)+\mathrm{ZnCl}_{2}(a q) \rightarrow}\end{array} $$

Write an unbalanced formula equation for each of the following. Include symbols for physical states in the equation. $$\begin{array}{c}{\text { a. solid zinc sulfide + oxygen gas } \longrightarrow} \\ {\text { solid zinc oxide + sulfur dioxide gas }} \\\ {\text { b. aqueous hydrochloric acid + solid }} \\ {\text { magnesium hydroxide } \longrightarrow \text { aqueous }} \\ {\text { magnesium chloride + liquid water }}\end{array}$$

Evaporating ocean water leaves a mixture of salts. Is this a chemical change? Explain.

Although cesium is not listed in the activity series in this chapter, predict where cesium would appear based on its position in the periodic table.
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