DIRECTIONS: Read the passage given below and answer the question that follow :A solution that is relatively resistant to change in pH is called a buffer solution. We can also say that the solution is buffered the simplest way to achieve substantial conc. of both acid and base in the same solution to use a conjugate acid-base pair. The most common form of buffer solution contains a weak acid and its conjugate base or a weak base and its conjugate acid.By using buffer concept. A student prepare 2L buffer solution of 0.330 M NaH2PO4 and 0.330 M Na2HPO4. The solution is divided in half between the two compartment (each containing 1L buffer)of an electrolytic cell, the electrodes used are Pt. Assume that the only reaction is the electrolysis of water. If electrolysis is carried out for 212 min with a constant current of 1.25 ampere. [Assume that pka(\(H_{2}PO_{4}^{-}\)) = 7.2]
The concentration of [H+] consumed by \(HPO_{4}^{2-}\) at anode is:
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Four successive members of the first row transition elements are listed below with atomic numbers. Which one of them is expected to have the highest E°M3+/M2+ value ?
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Higher the value of standard reduction potential,stronger is the oxidising agent, hence \(MnO_{4}^{-}\) is the strongest oxidising agent.
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AgNO3(aq) + KCl(aq) ⟶ AgCl(s) + KNO3(aq) Conductivity of the solution is almost compensated due to formation of KNO3(aq). However, after endpoint, conductivity increases more rapidly due to addition of excess AgNO3 solution.
Electrolysis of dilute aqueous NaCl solution was carried out by passing 10 milli ampere current. The time required to liberate 0.01 mol of H2 gas at the cathode is (1 Faraday =96500 C mol1/sup>)
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