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Chemistry 21 Online
OpenStudy (anonymous):

In my lab we reacted Ca with water. Then were asked to write the balanced chemical equation (Ca+2H2O-->Ca(OH)2 +H2). Then it asked me to explain how my observations support this equation?? I'm really not sure on this .. can someone give me an idea to start with?

OpenStudy (anonymous):

Did you observe any gas formation during the reaction?

OpenStudy (anonymous):

I was thinking that maybe I could type something like this: This equation supports the reaction because it is a very exothermic reaction(causing bubbles and releasing gas). Since we know that CaOH2 is an aqueous solution and H2 is gas this could support our equation

OpenStudy (anonymous):

Ya. Well... there were bubbles of gas coming to the top and popping.

OpenStudy (anonymous):

Any chance you were able to analyze the water to determine Ca(OH)2 formation?

OpenStudy (anonymous):

Other than possibly by pH?

OpenStudy (anonymous):

No. All we did was watch the reaction

OpenStudy (anonymous):

Ok. then you would be correct to indicate that visual observation of the reaction was the violent popping of Ca as well as the gas formation (bubbles) of H2.

OpenStudy (anonymous):

Okay. Thank you. I get so confused in lab. *sigh* ... I'm not a chemist. Lol. Even though I do enjoy the subject.

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