For a certain reaction, the activation energy is 52.1 kJ/mole. By what ratio will the rate constant change if the temperature is decreased from 175 degrees celsius to 75 degrees celsius? a. 0.00402 b. 0.0179 c. 0.996 d. 121 e. 249
Determining the concentration of an ion in equilibrium given the solubility product (Ksp) value.
The Ksp for silver iodide is 8.3 x 10^-17. What is the concentration of Ag+ in equilibrium with AgI(s) if [1-]= 1.0 x 10(^-1)M? a. 9.1 x 10(^-9)M b. 1.0 x 10(^-1)M c. 1.2 x 10(^-15)M d. 8.3 x 10(^-16)M e. 8.3 x 10(^-17)M
What is the correct orbital diagram for Mn2+?
Multiple choice question about the least buffer capacity.
Which of the following solutions has the least buffer capacity? a. a mixture of 0.100M H3PO4 and 0.100M H2PO4 b. a mixture of 0.200M H3PO4 and 0.100M NaOH c. a mixture of 0.200M H2PO4 and 0.100M HCl d. a mixture of 0.200M H2PO4 and 0.100M HNO3 e. All of the above have the same buffer capacity
Multiple choice questions about buffering solutions.
Which of the following solutions is not a buffer? a. 125mL of 0.200M HCl added to 200mL of 0.400M CH3CO2- b. 200mL of 0.400M HCl added to 125mL of 0.200M CH3CO2- c. 200mL of 0.500M NaOH added to 200mL of 1.000M HF d. 100mL of 0.500M H2PO4- added to 100mL of 0.100M HPO42- e. 100mL of 0.200M HF added to 300mL o ...continues
In a titration experiment, if the initial solution pH is 9.0 and equivalence point occurs at pH 3.0, then the reaction corresponds to a. the titration of a strong acid by a strong base b. the titration of a strong base by a strong acid c. the titration of a weak acid by a strong base d. the titration of a weak ba ...continues
Which of the following is a heterogeneous equilibria expression? a. 2NO(g)+O2(g) (equilibrium sign) 2NO2(g) b. H2(g)+I2(s) (equilibrium sign) 2HI(g) c. 2S(s)+3O2(g) (equilibrium sign) 2SO3(g) d. 2NH3(g) (equilibrium sign) N2(g)+3H2(g) e. both answers b and c
True or false statements on the characteristics of a voltaic cell.
Which of the following statements concerning voltaic cells are false? a. it consists of two half-cells b. it can serve as an energy source c. the two half-cells in a voltaic cell are connected by a salt bridge d. the electrodes in a voltaic cell must be composed of dissimilar metals e. reduction occurs at the ...continues
Which species is the best oxidizing agent? a. sodium metal b. sodium ion c. chlorine d. chloride ion e. carbon
Fill in the blank question about the cell voltage in a voltaic cell.
The cell voltage, E, is _________ for a reaction taking place in a voltaic cell. a. negative b. positive c. zero d. oxidative e. reductive
