Thisis a lab based on putting aluminum foil into a solution of water and copper chloride and seeing the reaction.1Aluminum is considered to be an elementWhat is the chemial definition of an element?2What is a compound?3What elements are present in the compound copper (II) chloride?4Describe the appearance of this compound.5What is the definition of a quot;saltquot;?6What was the uncertainty in your temperature readings? (i.ethe uncertainty in the thermometer)7Did the reaction you observed in this experiment absorb or release heat? How do you know?8Distinguish between a physical and chemical change.9When you dissolved the copper(II)chloride salt into the beaker of water, what did you observe? Was this a physical or chemical change?10What is the chemical definition of a solution?11How does a mixture differ from a compound?12What evidence is there that a chemical reaction occured when the aluminum was added to the copper(II)chloride solution?
Nope, recycling tends to save more resources across the board than it uses Paper can be recycled several time before it unusable, this decreases the number of live trees that need to be harvested to make paper pulp Plastics can be recycled almost indefinitely which helps reduce the amount of petroleum needed to create new plastic products Additionally the amount of land available to be used as landfills is rapidly shrinking as communities decide they don't want them in their backyards Please note that I said almost indefinitely, especially when compared to paper products
elements are substances that can not be broken down into constituentsA compound is when two or more element chemically bindCopper chloride contains copper and chlorineIt is probably a bluish-green crystaline solidA salt is an ionic compound typically from an acid-base reactionUncetainty is accuracyIt means how the displayed measurement corresponds to the actualThe reaction probably released heatGoogle exothermic and endothermic, but the easy way to tell is whether energy must be constantly added to sustain itA chemical change occurs when eletrons are gained or lostPhysical changes have more to do with observable changes (like ice melting or paper getting wet.) Dissolution is a physical changeHowever, when an ionic compound (like salt) dissolves, it actually ionizes, which is a chemical changeA solution is a solute mixed with a solvent (salt;water)Mixtures are not chemical solutions, but two substances combinedThink mudA chemical change can be detected if there is the 'destruction' of one substance and 'formation' of another, a temperature change, a change in phase.
