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WorksheetsCHEMSCORE Chapter 1 - 3
Total questions: 10
Worksheet time: 11mins
The iodide ion reacts with hypochlorite ion in the following way:
OCl- + I- ⟶ OI- + Cl-.
This rapid reaction gives the rate data shown. What is the rate law?
rate = [OCl-]2[I-]
rate = [OCl-][I-]2
rate = [OCl-][I-]
rate = [OCl-]
Which of the following plots will show a linear relationship for a second order reaction?
[A] vs time
1/[A] vs time
ln[A] vs time
[A]2 vs time
A reaction is found to be second order with respect to carbon monoxide. If the concentration of carbon monoxide is doubled, the rate of reaction __________.
doubles
remains unchanged
increases by a factor of 4
is reduced by a factor of 2
The heat released when 1 mole of ionic compound is formed from its gaseous ions. This is the enthalpy of.....
Lattice energy
Formation
Lattice energy dissociation
Ionisation
Identify the enthalpy change represented by letter g.
Enthalpy of formation
Enthalpy lattice of formation
Electron affinity of bromine
Enthalpy of atomisation of zinc
Factors affecting the value of lattice energy
the size of the ions only
the charges of the ions only
BOTH the size of the ions AND the charges of the ions
80.371
A VCE chemistry student sets up a galvanic cell using two standard half-cells with half reactions. Half-cell 1: Cr3+(aq)+e-→Cr2+(aq) Half-cell 2: Cr(s)→Cr2+(aq)+2e- Suitable materials for the electrodes of the two half-cells are
A VCE chemistry student sets up a galvanic cell using two standard half-cells with half reactions.
Half-cell 1: Cr3+(aq)+e-→Cr2+(aq)
Half-cell 2: Cr(s)→Cr2+(aq)+2e-
Using this information, we can determine that;
Half-cell 1 is the anode, where oxidation occurs
Half-cell 1 is the cathode, where reduction occurs
No spontatneous reaction will occur, since only chromium is involved
Cr3+ is the reductant, since it undergoes reduction
Calculate the E cell of following half cell.
Half-cell 1: Cr(aq)+ 3e-→Cr3+(aq)
Half-cell 2: Cu2+(s)→Cu+(aq)+e-
Given the E0 cell = 0.89 V; [Cr3+] = 0.5 M; [Cu+]= 0.1M; [Cu2+] = 0.5 M
+0.94 V
+1.41 V
+0.35V
