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, 21.06.2019 22:00, NREYESLDS2806
To save time, you can approximate the initial mass of the solid to the nearest ±1 g. for example, if you are asked to add 14.3 g of copper, add between 13 g and 15 g. which of the following sets include two samples with an equal density? which all that apply below 15.4 g gold and 18.7 g silver 15.2 g copper and 50.0 g copper 20.2 g silver and 20.2 g copper 11.2 g gold and 14.9 g gold
Answers: 1
Chemistry, 22.06.2019 06:30, reecedstceklein
Over the last 90 years, scientists have added to the body of evidence supporting the big bang theory. what is the latest piece of evidence discovered in 2014?
Answers: 1
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