can someone Fing answer this PLEASE! NOW
Chemical Reactions Performance Task
Description: A student conducted two different demonstrations in their science class that started with copper chloride (CuCl₂). They have provided you with the following data tables to help you determine if a physical change or chemical reaction occurred during the demonstrations.
Demonstration 1:
Reactants
substances at beginning of reaction
Products
substances at the end of the reaction
Substance
(Chemical Formula)
Copper Chloride
(CuCl₂)
Water
(H₂O)
Copper Chloride
(CuCl₂)
Water
(H₂O)
Properties
Density: 2.51 g/cm³
Melting Point: 100ºC
Boiling Point: 993ºC
Density: 1 g/cm³
Melting Point: 0ºC
Boiling Point: 100ºC
Density: 2.51 g/cm³
Melting Point: 100ºC
Boiling Point: 993ºC
Density: 1 g/cm³
Melting Point: 0ºC
Boiling Point: 100ºC
Based on the patterns (similarities and differences) in the properties of the reactants and products in the table above, is this a physical or chemical reaction? Cite specific evidence from multiple properties in the data table to support your answer. (5pts)
Claim
Evidence
Reasoning
Demonstration 2:
Reactants
substances at beginning of reaction
Products
substances at the end of the reaction
Substance
(Chemical Formula)
Copper Chloride
(CuCl₂)
Iron
(Fe)
Iron Chloride
(FeCl₂)
Copper
(Cu)
Properties
Density: 2.51 g/cm³
Melting Point: 100ºC
Boiling Point: 993ºC
Density: 7.86 g/cm³
Melting Point: 1538ºC
Boiling Point: 2682ºC
Density: 3.16 g/cm³
Melting Point: 677ºC
Boiling Point: 1023ºC
Density: 8.96 g/cm³
Melting Point: 1085ºC
Boiling Point: 2562ºC
Based on the patterns (similarities and differences) in the properties of the reactants and products in the table above, is this a physical or chemical reaction? Cite specific evidence from multiple properties in the table to support your answer. (5pts)
Claim
Evidence
Reasoning
Using the data from Demonstrations 1 and 2, fill out the table below to describe the difference between a physical and chemical reaction in terms of the rearrangement and/or conservation of atoms and molecules. Choose conserved or not conserved for atoms. Choose rearranged or not rearranged for molecules. (4pts)
Physical Changes
Chemical Reactions
Atoms:
(conserved/not conserved)
Molecules
(Rearranged/Not rearranged)
