Conceptual Checkpoint 21.06 Draw the carbanion that is formed when each of the following compounds is treated with sodium ethoxide. For each, draw the electron flow arrows and the resulting enolate resonance structure of that carbanion. Then, predict whether a substantial amount of ketone will be present together with the enolate at equilibrium. Include lone pairs and charges in your answer. Do not draw out any hydrogen explicitly in your products. Do not use abbreviations such as Me or Ph.

1. suppose a reaction mixture, when diluted with water, afforded 300 ml of an aqueous solution of 30 g of the reaction product malononitrile [ch2(cn)2], which is to be isolated by extraction with ether. the solubility of malononitrile in ether at room temperature is 20.0 g/100 ml, and in water is 13.3 g/100 ml. what weight of malononitrile would be recovered by extraction with (a) three 100-ml portions of ether and (b) one 300-ml portion of ether? suggestion: for each extraction, let x equal the weight extracted into the ether layer. in part (a), the concentration in the ether layer is x/100 and in the water layer is (30 x)/300; the ratio of these quantities is equal to k 20/13.3.

How do you identify the anode on a power source such as a battery? how do you identify the cathode? how are terms anion and cation?

What happens to the temperature of a substance when the average kinetic energy of its particles increases?