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Question 1 (1 point)
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In the first reaction with Epsom Salt added to ammonia, what evidence was there for a chemical reaction taking place?
Question 1 options:
color change
formation of a precipitate
increase in temperature
formation of bubbles
Question 2 (1 point)
In the second reaction with iron and oxygen, what evidence for a chemical reaction was NOT observed?
Question 2 options:
new substance formed
formation of a precipitate
color change
change in temperature
Question 3 (1 point)
In the third reaction which gas is released when baking soda is added to vinegar?
Question 3 options:
carbon dioxide
hydrogen gas
water
oxygen
Question 4 (1 point)
In the fourth reaction with copper sulfate and sodium hydroxide, what is the precipitate that is formed?
Question 4 options:
Cu(OH)2
NaOH
CuSO4
Na2SO4
