Calculate the pH of a solution that is prepared by dissolving 0.510 mol of hypochlorous acid (HClO, Ka = 3.00×10-8) and 0.233 mol of chloroacetic acid (CH2ClCOOH, Ka = 1.40×10-3) in water and diluting to 3.00 L. Also, calculate the equilibrium concentrations of HClO, ClO-, CH2ClCOOH, and CH2ClCOO-. Do not make an approximation unless the initial acid concentration is greater than 1000 × Ka. (Hint: The pH will be determined by the stronger acid of this pair.)

The scheme below is from a series of reactions that are part of a synthesis of vitamin a. answer the following questions with reference to this scheme. (i) what is "reagent a"? (ii) draw a step-by-step mechanism which explains the formation of compound c from compound b (iii) which reagents would you use to form compound e from compounds c and d (reagents b and c)? for each reagent suggested above in (ii) explain the role of the reagent in the reaction to (iv) form compound e. you may wish to do this by drawing a mechanism. 1. addition of reagent a но reagent a 2. н, о" thо oh нон-с compound a. compound b. compound c .ch-оh 1. reagent b "сно 2. reagent c сh oh compound e. compound d.

What is the value of keq for the reaction expressed in scientific notation?

Modern pennies are composed of zinc coated with copper. a student determines the mass of a penny to be 2.482 g and then makes several scratches in the copper coaling (to expose the underlying zinc). the student puts the scratched penny in hydrochloric acid, where the following reaction occurs between the zinc and the hcl (the copper remains undissolved): zn(s) + 2 hcl(aq) → h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 °c. the collected gas occupies a volume of 0.899 l at a total pressure of 79 j mmhg. calculate the percent zinc (by mass) in the penny. (assume that all the zn in the penny dissolves.)