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Chapter 6: Problem 36

Which of the following species cannot have conjugate base? (a) \(\mathrm{HSO}_{4}^{-}\) (b) \(\mathrm{HPO}_{4}^{-2}\) (c) \(\mathrm{PO}_{4}^{-3}\) (d) \(\mathrm{H}_{2} \mathrm{PO}_{2}^{-}\)

Short Answer

Expert verified
Answer: (c) \(\mathrm{PO}_{4}^{-3}\)

Step by step solution

01

Determine if each species can lose a proton.

Examine each species and determine if they can lose a proton: (a) \(\mathrm{HSO}_{4}^{-}\): Yes, it can lose an \(\mathrm{H}\), forming \(\mathrm{SO}_{4}^{-2}\). (b) \(\mathrm{HPO}_{4}^{-2}\): Yes, it can lose an \(\mathrm{H}\), forming \(\mathrm{PO}_{4}^{-3}\). (c) \(\mathrm{PO}_{4}^{-3}\): It doesn't have any \(\mathrm{H}\) to lose, so it cannot form a conjugate base. (d) \(\mathrm{H}_{2} \mathrm{PO}_{2}^{-}\): Yes, it can lose an \(\mathrm{H}\), forming \(\mathrm{HPO}_{2}^{-2}\).
02

Identify the species that cannot have a conjugate base.

Based on our analysis, the species that cannot have a conjugate base is option (c) \(\mathrm{PO}_{4}^{-3}\), because it cannot lose a proton.

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Most popular questions from this chapter

Which of the following has the highest value of pH? (a) \(\mathrm{HCl}\) (b) \(\mathrm{NaOH}\) (c) \(\mathrm{Ca}(\mathrm{OH})_{2}\) (d) \(\mathrm{CH}_{3} \mathrm{COOH}\)

Match the entries given in column A with appropriate ones from column B. $$ \begin{array}{lll} \hline \text { Column A } & \text { Column B } \\ \hline \text { A. } & \text { Sodium chloride } & \text { ( ) a. Baking powder } \\ \text { B. } & \text { Tartaric acid } & \text { () b. Freezing mixture in ice } \\\\\text { creams } \\ \text { C. } & \text { Potassium nitrate } & \text { () c. Antacid in medicine } \\ \text { D. } & \begin{array}{l} \text { Sodium } \\ \text { bicarbonate } \end{array} & \text { () d. Gun powder } \\ \text { E. } & \text { Citric acid } & \text { () e. Bleaching powder } \\ \text { F. } & \begin{array}{l} \text { Calcium } \\ \text { hydroxide } \end{array} & \text { () } f \text { . Flavouring agent } \\ \hline \end{array} $$

Which of the following indicators is the best indicator for the detection of end point in the titration of \(\mathrm{CH}_{3} \mathrm{COOH}\) and \(\mathrm{KOH}\) ? (a) methyl orange (b) phenolphthalein (c) methyl red (d) none of these

Which of the following salts can produce only two types of radicals? (a) \(\mathrm{NaKCO}_{3}\) (b) \(\mathrm{CaOCl}_{2}\) (c) \(\mathrm{NH}_{4} \mathrm{HSO}_{4}\) (d) \(\mathrm{Na}\left(\mathrm{NH}_{4}\right) \mathrm{HPO}_{4}\)

Identify the species which can give both conjugate acid and conjugate base. (a) \(\mathrm{NH}_{4}^{+}\) (b) \(\mathrm{H}_{2} \mathrm{PO}_{4}^{-}\) (c) \(\mathrm{PO}_{4}^{-3}\) (d) \(\mathrm{H}_{3} \mathrm{O}^{+}\)
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