Chem Lab 1 Report

Topics: Chemistry, Chemical reaction, Hydrochloric acid Pages: 3 (1259 words) Published: July 12, 2015
Cydney Kessler 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
HCl
Hydrochloric Acid
Bubbles
yes
A2
NaOCl
Sodium-Hypochlrite
Kl
Potassium Iodide
Observation 1: None
Add 2 drops of solution
Observation 2: Solution turned blue
Yes
A3
Kl
Potassium Iodide
Pb(NO3)2
Lead Nitrate
Turned Yellow
Yes
A4
NaOH
Sodium Hydroxide
C20H14O4
Phenolphthalein
Turned pinkish red (magenta)
Yes
A5
HCl
Sodium Hydroxide
C20 H14 O4
Phenolphthalein
Turned Cloudy
Yes
A6
NaOH
Sodium Hydroxide
AhNO3
Silver Nitrate
Turned Brown
Yes
B1
AgNO3
Silver Nitrate
NH4OH
Aqueous Ammonia
Observation 1: Turned Cloudy
Absorb in paper towel & expose to sunlight
Observation 2: no reaction noted
yes
B2
NH4OH
Aqueous Ammonia
CuSO4
Copper Sulfate
The reaction turned light blue
Yes

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...
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