Introduction
What is the purpose of the lab?
Put copper through multiple reactions until solidifies again
1. lab coat
2. goggles
3. gloves
What are the 3 reaction equations used?
Single-displacement
Double-replacement
Redox (Oxidation-reduction)
What is it called when the copper dissolved into liquid?
Oxidation
What was the goal?
recover as much copper possible
What mL beaker did the group use?
100 mL beaker
What was our percent error for our groups lab experiment?
4%
When the sodium hydroxide was added, what color did the mixture turn into?
Blue cloudy color
Law of conservation?
mass can't be created or destroyed, but through chemical and physical reactions, mass is maintained.
How much copper wire was used?
0.5 grams of copper
What is the percent recovery formula?
(Final/Initial) X 100%
When hydrogen chloride was added, what was the reaction?
Liquid and solid parts of the solution were being separated, single-displacement reaction
Single-displacement? or
Double-displacement?
one element on reactant side is substituted for another on the products side, AB + C --> AC + B
two elements on the reactant side are exchanging their ions for elements on the product side, AB + CD --> AD +CB
How long did the beaker sit in the fume hood ant at what degree?
for 25 minutes and at 150 degrees celsius
What was our groups percent recovery percentage?
104%
What were some possible errors for this lab?
adding sodium hydroxide drops too fast
not letting the zinc sit long enough
Hypothesis
If the group began with 0.5 grams of copper, then they expect a 100% recovery of copper.
For the second experiment, how much sodium hydroxide was used?
8 drops
What is the percent error formula?
((Experimental-theoretical)/(theoretical)) X 100
What were some improvements mentioned?
Making sure measurements were precise
Making sure the drops were added a constant speed