Suppose you have an indicator that is diprotic and has pKa1 = 3 and pKa2 = 7. If H2In is yellow, HIn- is red, and In2- is blue, what species is/are significantly present at pH of 7? what is the color of the indicator at a pH of 7?

Your answer should have the same number or significant figures as a he starting measurement. 3201 ml =

Which of these reactions are redox reactions? check all that apply. cd + hcl → cdcl2  + h2cucl2  + na2s → 2nacl + cuscaco3  → cao + co2          2zns + 3o2  → 2zno + 2so2          ch4  + 2o2  → co2  + 2h2o

14. complete and balance the equations for the single displacement reactions. a. zn + pb(no3)2 -> b. al + niso4 -> 15. complete and balance the equations for the double displacement reactions. a. agno3(aq) + nacl(aq) -> b. mg(no3)2(aq) + koh(aq) -> 16. complete and balance the equations for the combustion reactions. a. __ ch4 + o2 -> b. __ c3h6 + o2 -> c. + o2 ->