Describe the standard hydrogen electrode assigned 0 V and the conditions for measuring a standard electrode potential, and interpret E° values from the data booklet: a more positive value means a stronger oxidizing agent that is more easily reduced.
Tę umiejętność sprawdza 7 zadań wzorowanych na arkuszach IB z lat 2023–2025.
The cyanide ion acts as a ligand in many complex ions, for example hexacyanoferrate(III), [Fe(CN)6]3−. (i) State the type of bond, as precisely as possible, that joins each cyanide ion to the iron ion. (ii) Deduce the oxidation state of iron in…
During discharge, sodium atoms stored in the hard carbon are converted into sodium ions. (i) State the half-equation for the process taking place at the anode while the battery discharges. (ii) With reference to section 19 of the data booklet, comment on the…
Which of the following is a correct description of the standard hydrogen electrode (SHE)? A. Hydrogen gas at 100 kPa is bubbled through a 1.0 mol dm−3 solution of sodium hydroxide B. Its electrode potential of 0.00 V is assigned by convention,…
Complete the diagram of a standard hydrogen electrode by writing in each box the feature that it points to.
A half-cell of metal X in a 1.00 mol dm−3 solution of X2+ ions is connected to a standard hydrogen electrode (SHE). The voltmeter reads 0.34 V and the X electrode is the positive terminal. Which statement is correct? A. The standard…
A standard hydrogen half-cell is connected to a standard Cu2+/Cu half-cell. A voltmeter shows 0.34 V and electrons flow in the external circuit from the hydrogen half-cell to the copper half-cell. Which statement is correct? A. The hydrogen half-cell…
The standard electrode potential, E⊖, of the half-cell Al3+(aq) + 3 e− ⇌ Al(s) is −1.66 V. (i) Calculate the standard cell potential for the reaction 2 Al(s) + 6 H2O(l) → 2 Al3+(aq) + 6 OH−(aq) + 3 H2(g) Use section 19 of the data…
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