Chemistry 1406

Date of Experiment: 6/9/15

Report Submitted: June 10, 2015

Title: Observations of Chemical and Physical Changes

Purpose: the purpose of this lab experiment is that I will be able to decipher the difference between a chemical and physical change. I will be about to tell whether a chemical change has occurred during the experiment or if it was a physical change and I will be able to answer why it is either one.

Procedure: In the lab experiment, I mixed different types of chemicals with different background to see if there was a chemical change, and also to see what type and why that change occurred.

DATE TABLE 1: Chemical Reactions

Well | Chemical #1( 4 drops) | Chemical # 2(4 Drops) | Observations | Chemical Change (Y/N) |

A1 | NaHCO3 SodiumBicarbonate | HClHydrochloric Acid | Bubbles | yes |

A2 | NaOClSodium-Hypochlrite | KlPotassium Iodide | Observation 1: NoneAdd 2 drops of solution Observation 2: Solution turned blue | Yes |

A3 | KlPotassium Iodide | Pb(NO3)2Lead Nitrate | Turned Yellow | Yes |

A4 | NaOHSodium Hydroxide | C20H14O4Phenolphthalein | Turned pinkish red (magenta) | Yes |

A5 | HClSodium Hydroxide | C20 H14 O4Phenolphthalein | Turned Cloudy | Yes |

A6 | NaOHSodium Hydroxide | AhNO3Silver Nitrate | Turned Brown | Yes |

B1 | AgNO3Silver Nitrate | NH4OHAqueous Ammonia | Observation 1: Turned Cloudy * Absorb in paper towel & expose to sunlightObservation 2: no reaction noted | yes |

B2 | NH4OHAqueous Ammonia | CuSO4Copper Sulfate | The reaction turned light blue | Yes |

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QUESTIONS

Suppose a household product label says it contains sodium hydrogen carbonate (sodium

bicarbonate). Using your results from Data Table 1 as a guide, how would you test this material

For the presence of sodium bicarbonate? Add hydrochloric acid and wait for the reaction.

B. . Write the chemical equation for the reaction in well A6. AgOH(s) + NaNO3(aq)

C. One of the reactions you observed resulted in this...