In the process of silver-plating a metal M, the metal M is the?
anode and a direct current is used
cathode and an alternating current is used
anode and an alternating current is used
cathode and a direct current is used
Correct answer is D
Plating requires ions to flow through an electrolyte in an electric field. Positive ions flow with the electric field, negative ions against the electric field. This electric field comes from a DC supply connected to the electrodes. While silver plating, Ag is the anode while the metal to be coated is the cathode.
Neutralization involves a reaction between H3O+ and?
CI-
OH-
NO3-
CO32-
Correct answer is B
No explanation has been provided for this answer.
In general, an increase in temperature increases the solubility of a solute in water because?
more solute molecules collide with each other
most solutes dissolve with the evoltion of heat
more solute molecules dissociate at hihger temperatures
most solutes dissolve with absorption of heat
Correct answer is D
No explanation has been provided for this answer.
do not scatter light, suspensions do
can be separated by filtration, suspension cannot be so separated
can be separated by a membrane, suspensions cannot
do not settle out on standing, suspensions do
Correct answer is D
No explanation has been provided for this answer.
ethane
chlorine
hydrogen chloride
ethene
Correct answer is C
No explanation has been provided for this answer.