The dissociation constant of a work acid is 1 × 10–4. In order ofprepare a buffer solution with a pH = 5 the [Salt]/[Acid] ratio should be
Consider the following cell reaction: 2Fe(s) + O2(g) + 4H+(aq) → 2Fe2+(aq) + 2H2O(l); E° = 1.67 V At [Fe2+] = 10–3 M, P(O2) = 0.1 atm and pH = 3, the cell potential at 25°C is |
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When 3.86 amperes current is passed through an electrolyte for 50 minutes, 2.4 grams of adivalent metal is deposited. The gram atomic weight of the metal (in grams) is |
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When electric current is passed through acidified water for 1930 seconds, 1120 mL of H2 gas is collected (at STP) at the cathode. What is the current passed in amperes? |
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The potential of a hydrogen electrode at pH = 10 is |
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How is electrical conductance of a conductor related with length and area of cross section of the conductor ? |
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What flows in the internal circuit of a galvanic cell? |
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What is the electrochemical equivalent (in g coulomb–1) of silver? (Ag = 108; F = Faraday) |
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What is the reduction electrode potential (in volts) of copper electrode when [Cu2+]= 0.01 M in a solution at 25°C? (E° of Cu2+/Cu electrode is +0.34 V) |
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A current of 0.5 amperes is passed for 30 minutes through a voltmeter containing CuSO4 solution. Find the weight of Cu deposited. |
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The dissociation constant of a work acid is 1 × 10–4. In order ofprepare a buffer solution with a pH = 5 the [Salt]/[Acid] ratio should be |
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