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An experimental data on the reaction of H2 and PO3-3 is given below:
Initial [PO3-3]
Initial [H2]
Initial Rate
Experiment 1
0.100
0.100
1.50
Experiment 2
0.200
0.100
3.00
Experiment 3
0.100
0.200
6.00
a) What is the order of reaction with respect to [PO3-3]?
b) What is the order of reaction with respect to [H2]?
c) What is the overall reaction?
A solution is prepared at 20oC and its concentration is expressed in two different units; Molarity and Molality. The solution is then heated to 88oC. Which of the concentration units will change?
Calculate the voltage that would result if the following half-cells were combined. Identify which reaction is oxidation and which is reduction. Also label the anode and the cathode.
- Zn ⟶ Zn2+ + 2e-
Cu ⟶Cu2+ + 2e-
- Au ⟶ Au3+ + 3e-
Ag ⟶ Ag+ + 1e-
What is the pH of a buffer made up of 0.5M NH3 and 0.456M NH4CI? pKb NH3= 4.74
1. What is the pH of a solution with [H^ + ] of 1.0*10^ -9 M? What is its pOH? (Kw=[H^ + ][OH^ - ])
2. The [H3O^ + ] of a solution is 1.3 x 10 ^ - 5 , Calculate the [OH^ - ], pH and pOH of the solution. Is the solution acidic or basic?
3. The pH of a solution is 8.7. What are the pOH, [H3O^+] and [OH^-] of the solution?
Balance the following redox reaction using the half-reaction method.
Fe2+(aq)+Cr2072-(aq)->Fee+(aq)+Cr3+(aq)
Is the reactant undergoing oxidation or reduction in each of the following incomplete chemical equations? Justify your answer.
- SnO2 → SnO
- C6H6 → C6H12
- KClO3 → KCl
- NO → NO2
- MnO4-2 → MnO4-
Balance the following redox reaction that takes place in an acidic solution using the oxidation number method: Fe203(s)+CO(g)-Fe3(aq)+Cr3+(aq)
during a particular chemical reaction it takes 100Kj of energy to break all the bonds and 150 Kj of energy is released when the new bonds form. Which is true about the overall reaction?
1. it is endothermic and absorbs energy
2. it is exothermic and releases 50 Kj
3. It is exothermic and releases 150 Kj
4. it is endothermic and releases energy
A 4.00 * 102 g piece of iron at 22.0°C is heated in a bomb calorimeter until the temperature is 250.0°C. If the iron absorbs 41.04 kJ of heat, what is the specific heat capacity of the iron?
