Record your data either in your lab notebook or in the space below.
Step
Material
Chang...
Record your data either in your lab notebook or in the space below.
Step
Material
Change(s) Observed
Type of Change (Physical/Chemical)
Reasoning
2
Calcium carbonate
Particle size changed (it was pulverized and became a powder)
Physical Change
It did not change its identity, only the particle size.
3
Calcium carbonate and hydrochloric acid
Color changed; created a gas; bubbles
Chemical
Indicated by the production of bubbles the calcium carbonate was transformed into a different substance
4
Water
Bubbles; gas
Physical
It underwent a phase change but it retained its original properties
5
Copper sulfate pentahydrate
Gas; color change
Chemical
Gas is given off and color changed – these are indicators of a color change
6
Iron filings and sulfur
Color Change; iron is removed
Physical
The color change occurred but each solid kept its original properties.
7
Lead nitrate and potassium iodide
Color change; created a solid substance
Chemical
When the color change and solid formation occurred, its strong evidence that the two made a new substance
8
Magnesium and hydrochloric acid
Bubbling; increased temp by 33 degrees; strip dissolved
Chemical
The temp changes; the magnesium disappears, and a gas is produced, this indicates a chemical change
9
Candle
Wax melts (drips); wick is burned ‘disappears’; light is produced
Chemical and physical
The wax changes shape (physical change); heat and light is produced (chemical change)
can you analysis and write a conclusion for it?
Answers: 3
Chemistry, 22.06.2019 12:00
In the following redox reaction which is the oxidizing agent and which is the reducing agent? alcl3 + na nacl + al oxidizing agent = reducing agent =
Answers: 1
Chemistry, 22.06.2019 16:30
Ammonium perchlorate nh4clo4 is the solid rocket fuel used by the u.s. space shuttle. it reacts with itself to produce nitrogen gas n2 , chlorine gas cl2 , oxygen gas o2 , water h2o , and a great deal of energy. what mass of nitrogen gas is produced by the reaction of 2.1g of ammonium perchlorate?
Answers: 2
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Which property of a rock remains unchanged by mechanical weathering? a. total surface area b. size and shape c. mineral composition d. sharpness
Answers: 1
Chemistry, 22.06.2019 21:30
What is the correct name for the compound cocl3? a) cobalt(i) chloride b) cobalt(i) chlorate c) cobalt(ii) chlorate d) cobalt(iii) chloride
Answers: 1
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