b. species oxidized versus the oxidizing agent c. oxidation state versus actual

Question

b. species oxidized versus the oxidizing agent c. oxidation state versus actual charge are 26. When balancing reactions in Chapter 3, we did not mention that reactions must be charge balanced as well as mass bal- anced. What do charge balance and mass balance mean? How are redox reactions charge balanced? Exercises In this section similar exercises are paired. Aqueous Solutions: Strong and Weak Electrolytes 27. Show how each of the following strong electrolytes "breaks is up" into its component ions upon dissolving in water by draw- ing molecular-level pictures. a. NaBr b. MgCl2 c. Al(NO3)3 d. (NH4)2SO4 e. NaOH se f. FeSO4 g. KMnO4 h. HCIO4 i. NH C2H,02 (ammo- nium acetate) L28. Match each name below with the following microscopic pic- tures of that compound in aqueous solution. iv. a. barium nitrate b. sodium chloride c. potassium carbonate d. magnesium sulfate

Explanation / Answer

a) NaBr(s) + H2O(l) - - - - - > Na+(aq) + Br-(aq)

b) MgCl2(s) + H2O(l) - - - - - > Mg2+(aq) + 2Cl-(aq)

c) Al(NO3)3(aq) + H2O(l) - - - - - > Al3+(aq) + 3NO3-(aq)

d) (NH4)2SO4(s) + H2O(l) - - - - - - > 2NH4+(aq) + SO42-(aq)

e) NaOH(s) + H2O(l) - - - - - > Na+(aq) + OH-(aq)

f) FeSO4(s) + H2O(l) - - - - - - > Fe2+(aq) + SO42-(aq)

g) KMnO4(s) + H2O(l) - - - - - - > K+(aq) + MnO4-(aq)

h) HClO4(l) + H2O(l) - - - - > H3O+(aq) + ClO4-(aq)

i) CH3COONH4(s) + H2O (l) - - - - > CH3COO-(aq) + NH4+(aq)

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