Table of contents

1. The Chemical World9m
- The Scientific Method
  9m
2. Measurement and Problem Solving2h 19m
3. Matter and Energy2h 15m
4. Atoms and Elements2h 33m
5. Molecules and Compounds1h 50m
6. Chemical Composition1h 23m
7. Chemical Reactions1h 43m
8. Quantities in Chemical Reactions1h 8m
9. Electrons in Atoms and the Periodic Table2h 32m
10. Chemical Bonding2h 10m
11 Gases2h 7m
12. Liquids, Solids, and Intermolecular Forces1h 11m
13. Solutions3h 1m
14. Acids and Bases2h 14m
15. Chemical Equilibrium1h 27m
16. Oxidation and Reduction1h 33m
17. Radioactivity and Nuclear Chemistry53m

7. Chemical Reactions

Complete Ionic Equations

Introduction to Chemistry

7. Chemical Reactions

Complete Ionic Equations

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Multiple Choice

Which of the following reagents could be used to separate the two anions from a solution containing magnesium nitrate and cesium hydroxide?

NH₄CN

NaCl

KNO₃

ZnBr₂

CsBrO₃

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Verified step by step guidance

Identify the anions present in the solution. Magnesium nitrate (Mg(NO3)2) contains the nitrate ion (NO3^-), and cesium hydroxide (CsOH) contains the hydroxide ion (OH^-).

Consider the solubility rules for common ionic compounds. Nitrates (NO3^-) are generally soluble in water, while hydroxides (OH^-) are often insoluble, except for those of alkali metals and some alkaline earth metals.

Evaluate the potential reagents for their ability to form insoluble compounds with either nitrate or hydroxide ions. The goal is to find a reagent that can selectively precipitate one of the anions.

Analyze the given reagents: NH4CN, NaCl, KNO3, ZnBr2, and CsBrO3. Consider their potential to form insoluble compounds with NO3^- or OH^-.

Recognize that ZnBr2 can react with OH^- to form zinc hydroxide (Zn(OH)2), which is insoluble in water, thus allowing the separation of hydroxide ions from the solution.