purpose: To examine the reaction of calcium and water
hypothesis:
Calcium will react very violently in water and sounds will be heard (i.e. pop, boom, etc.) This is because calcium is an alkaline earth metal, ad the metals in that family are highly reactive in water. Hydrogen and oxygen will be released because those are the only gases there and that metals are 'lost' from the experiment during my Mn+H2O2 experiment.
Variables:
-controlled: relighting flames (O2) + squeaky (H2)
-independent: calcium
-dependent: save size beakers
-how to measure dependent: use a test tube to capture the gas.
method: use the BC science 9 method on page 97.
results: see left picture
Sentence:
A white mysterious solid appears at the bottom of the beaker.
Evaluation:
- problem 1: collecting gas
- problem 2: catch calcium
Solution: - use a different method.
- use 2 smaler pieces of calcium
Questions #1 and 2
1. What changes have I observed? I observed a white solid at the bottom of the beaker and the liquid changing from green to purple due to the universal indicator.
2. What gas was produced? Hydrogen and oxygen gas was produced.
Conclusion: Hydrogen, oxygen, a white solid and a base is made. (Ca +H20 = CaOH)
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P.S. : This may sound unbelieveable, but since my antivirus reported that my computer had viruses, I was worried about the dangers of using an infected computer. Therefore, I had to use another computer which had no firefox to create this blog. That was why there was no subscripts and superscripts in the names of chemicals.
In conclusion, please disregard the lack of subscripts and superscripts.
