What happens in a double-replacement reaction?
O
A. The elements in two compounds switch places.
B. Two reactants combine to form one compound.
O
C. One compound separates into two or more products.
D. An element replaces an element in another compound.

Which of your 24 wells had indications that a chemical reaction occurred? how were you able to tell that a chemical reaction occurred? which of your 24 wells had indications that a physical reaction occurred? how were you able to tell that a physical reaction occurred? report on both mixing and evaporation. make a general statement about whether your hypotheses were validated or rejected. must your hypotheses be correct for this to be a successful laboratory?