An excess of zinc carbonate was added to a 20.0 mL solution X that contains sulfide and thiosulfate ions. Reaction occured according to the net ionic equation below:

S2- + ZnCO3 → ZnS + CO32-

Upon completion of the reaction, the solution was filtered into a 50.0 mL volumetric flask and diluted to the mark.

20.0 mL of the diluted filtrate was then withdrawn and titrated with 5.20 mL of 0.01000 M standard solution of iodine.

What is the concentration (in molarity) of thiosulfate ion in the initial solution X.

13. calculate the initial concentration (before precipitation) of carbonate ions after the addition of each 0.05 ml of solution b to the 1.00 l beaker of solution a. divide the work among group members and write the answers in the table in model 3. assume the volume change as solution b is added is negligible. 14. notice the initial concentrations of zn2+ - and cu2+ in the table in model 3. a. explain how these were obtained from the data in model 2. b. as solution b is added and precipitates form, do these initial concentrations change? 15. use the data in model 2 to indicate the presence of precipitate (either znco3 or cuco3) after each 0.05 ml addition of solution b in model 3. 16. use the initial concentrations of carbonate ions and zinc ions to calculate the reaction quotient, qsp for the zinc carbonate scenarios in model 3. divide the work among group members and write the answers in the table in model 3. 17. use the initial concentrations of carbonate ion and copper(ii) ions to calculate the qsp for the copper(ii) carbonate scenarios in model 3. divide the work among group members and write the answers in the table in model 3.

Which statement is best described as a atom

Significant figures are digits read directly from the measuring instrument plus one more digit, which is __ by the observer.