Multiple Choice
Which of the following is the correct net ionic equation for the reaction between MgSO4(aq) and Pb(NO3)2(aq)?
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6. Chemical Quantities & Aqueous Reactions
Complete Ionic Equations
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Which of the following reagents could be used to separate the two anions from a solution containing magnesium nitrate and cesium hydroxide?
A
NH4CN
B
NaCl
C
KNO3
D
ZnBr2
E
CsBrO3
Verified step by step guidance1
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 reactions of each reagent with the anions. The goal is to find a reagent that will form an insoluble compound with one of the anions, allowing for separation.
Examine the given reagents: NH4CN, NaCl, KNO3, ZnBr2, and CsBrO3. Consider the solubility of potential products formed with NO3^- and OH^-.
Determine that ZnBr2 can react with OH^- to form Zn(OH)2, which is insoluble in water, thus allowing the separation of OH^- from NO3^- in the solution.
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