A sample of pure water was spiked with 0.475 ng/mL silver ion. Ten replicate determinations of the spiked water sample gave 0.485 , 0.465 , 0.442 , 0.428 , 0.469 , 0.449 , 0.453 , 0.457 , 0.435 , and 0.420 ng/mL silver ion. Determine the mean percent recovery of the spike and the detection limit of the analytical method used for the silver ion determination.

Consider the following reaction at equilibrium: c(s)+h2o(g)⇌co(g)+h2(g) predict whether the reaction will shift left, shift right, or remain unchanged upon each of the following disturbances. a) c is added to the reaction mixture. b) h2ois condensed and removed from the reaction mixture c) co is added to the reaction mixture d) h2 is removed from the reaction mixture.