Physical and chemical changes? - using vinegar to etch aluminum
Chemistry in the 10th School year please help
a. mothballs evaporate in the closet.
b. Hydrofluoric acid attacks glass and is used to record the calibration marks on glassware.
c. Flashlight batteries corroded and leaks in the long-term storage.
D.whole vinegar curdles milk when it is added.
Please help me this day are the only ones who could not understand:)
Saturday, February 13, 2010
Using Vinegar To Etch Aluminum Physical And Chemical Changes?
1 comment:
Decide whether the substance of the change.
a. phase change, if the substance remains the same, but is now a gas.
b. ATTACKS word is a characteristic of a reaction. Reactions to the change in the substance of something else. The etched glass will remain the same, but the lines have been chemically removed.
c. The race is a different chemical modification.
d. Curd is a further chemical modification. The clotting protein in milk can, because the protein undergoes a change in its molecular conformation.
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