Chemical Changes Lab

Report Submitted: September 4, 2013 Title: Observations of Chemical Changes Purpose: To observe some properties of chemical reactions and to associate chemical properties with household products. Procedure: In this experiment I used a 96-well plate to hold each of the chemical reactions that occurred during this lab. Using a pipet, I added two drops of one chemical with two drops of another chemical and observed the effects of each reaction. Data Table 1: Experimental Data Well # | Chemicals | Observations | | | Reaction | White paper | Dark paper | A1 | NaHCO3 and HCl-CO2 | Bubbles formed from CO2 emissions | Clear solution | Clear Solution | B1 | HCl and BTB | Solution changed from clear to orange | Orange solution | Orange solution | C1
| Blue solution | Blue solution | D1 | HCl and blue dye | Solution changed to Green | Green solution | Green solution | E1 | Blue dye and NaOCl | Solution remained Blue. When HCl is introduced, solution turned blue green | Blue-green solution | Blue-green solution | F1 | NaOCl and KI | Solution changed from clear to Green, with the addition of Starch, the solution turned Black | Black solution | Black solution | G1 | KI and PB(NO3)2 | Yellow precipitate formed | Yellow solution | Yellow solution | H1 | NaOH and Phenolphthalein | Solution changed from clear to Purple-red | Purple-red solution | Purple-red solution | A7 | HCl and Phenolphthalein | No reaction. No color change with Acids. Should turn a reddish color with bases | Clear solution | Clear solution | B7 | NaOH and AgNO3 | No reaction | Clear solution | Clear solution | C7 | AgNO3 and NH3 | No reaction | Clear solution | Clear solution | D7 | NH3 and CuSO4 | Blue precipitate formed | Blue solution | Blue solution