A buffer is a chemical that A. is identical to baking soda. B. Both the first and second answer choices are correct. C. can quickly absorb excess H+ ions to keep a solution from becoming too acidic. D. can quickly release H+ ions to counteract any increases in the OH– concentration in a solution. E. restores the pH of a solution to 7.0.

Word equation for k(s)+h2o(l) yield koh(aq) + h2(g)

Lab reagent, hypothesis test.a reference solution used as a lab reagent is purported to have a concentration of 5 mg/dl. six samples are taken from this solution and the following concentrations are recorded: (5.32, 4.88, 5.10, 4.73, 5.15, 4.75) mg/dl.these six measurements are assumed to be an srs of all possible measurements from solution.they are also assumed to have a standard deviation of 0.2, a normal distributin, and a mean concentration equal to the true concentration of the solution.carry out a significance test to determine whether these six measurements provide reliable evidence that the true concentration of the solution is actually not 5 mg/dl.

Which statement characterizes synthetic polymers? a. they come from animals and plants. b. they are found in nature. c. they are made in a lab. d. they are components of starch.