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WorksheetsThe Alchemist: Copper to Gold LAB
Total questions: 17
Worksheet time: 17mins
What was the appearance of the "Untreated penny"?
Gol
Bronze
Silver
Green
What was the appearance of the penny treated with Zn and NaOH?
B
Gold
Silver
Bronze
Penny treated with Zn and NaOH and heated in burner flame?
Bronze
Silver
Golde
Black
What type of substance did you create?
Element
Com
Homogenous mixtru
Heterogenous Mixture
What two metals make up this alloy? If we do in fact have an alloy or a physical homogenous mixture.
Na, Zn
Cu, Sn
Fe, Mn
What happened to the copper atoms originally present in the treated pennies?
Identify at least two practical uses for metallic changes similar to those you observed in this activity.
_CF4 + _Br2 -- _CBr4 + _F2
Balance this equation, AlCl3 + NaOH → Al(OH)3 + NaCl
3,1,3,1
1,3,3,1
1,1,1,3
1,3,1,3
3 Pb + 2 H3PO4 ----> 3 H2 + 1 Pb3(PO4)2
Synthesis (or combination)
Decomposition
Single replacement
Double replacement
What type of reaction involves one element replacing another element in a compound?
Single Replacement Reaction
Double Replacement Reaction
Synthesis Reaction
Decomposition Reaction
The main element present in brass and bronze is
copper
lead
zinc
tin
Alloys are created to improve the working properties and appearance of metals, they are made by cobining two or more elements.
True
False
Brass is an alloy consisting of a mixture of
copper and zinc
copper and lead
copper and tin
tin and lead
Zn + 2 OH− → ZnO2 + H2
What type of reaction is the equation.?
Double displacement
Synthesis
Decomposition
Single Replacement
