Write a short notes on solubility product principle and its application?

Which statement justifies that phosphine (ph3) is a polar molecule?

Voltaic cells produce a positive overall charge. what does this indicate? a. the reaction is likely to be endothermic. b. the reaction is spontaneous. c. the reaction is not likely to occur. d. the reaction is not spontaneous.

Determine the reaction and balance the following equations urgent due in the morning