Concept explainers
Predict in each case whether a reaction is likely to occur. If so, write a net ionic equation.
a.
b.
c.
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General Chemistry: Principles and Modern Applications (11th Edition)
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- You wish to determine the weight percent of copper in a copper-containing alloy. After dissolving a 0.251 -g sample of the alloy in acid, an excess of KI is added, and the Cu2+ and I ions undergo the reaction 2 Cu2+(aq) + 5 I(aq) 2 CuI(s) + I3(aq) The liberated I3 is titrated with sodium thiosulfate according to the equation I3 (aq) + 2 S2O32(aq) S4O62(aq) + 3 I (aq) (a) Designate the oxidizing and reducing agents in the two reactions above. (b) If 26.32 mL of 0.101 M Na2S2O3 is required for titration to the equivalence point, what is the weight percent of Cu in the alloy?arrow_forwardVitamin C is ascorbic acid, HC6H7O6, which can be titrated with a strong base. HC6H7O6(aq) + NaOH(aq) NaC6H7O6(aq) + H2O() A student dissolved a 500.0-mg vitamin C tablet in 200.0 mL water and then titrated it with 0.1250-M NaOH. It required 21.30 mL of the base to reach the equivalence point. Calculate the mass percentage of the tablet that is impurity.arrow_forwardExperiments show that propionic acid (CH3CH2COOH) is a weak acid. Write the chemical equation.arrow_forward
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