Friday
December 19, 2014

Homework Help: Chemistry

Posted by candy on Saturday, January 31, 2009 at 9:46am.

1) When calcium is reacted with cold water, the equation is as follows: -
Ca(s) + H2O(l) -->Ca(OH)2(aq) + H2(g)
Isn't Ca(OH)2 insoluble? Why is the state symbol aqueous? When I conducted the experiment in a test tube with cold water, I got a white suspension (precipitate).

2) When I placed a piece of magnesium foil in a test tube of cold water,a very slow stream of hydrogen gas bubbles was observed. When writing the equation for the reaction, should I write
i) Mg(s) + 2H2O(l)-->Mg(OH)2(s) + H2(g)

or

ii)Mg(s) + H2O(g)-->MgO(s) + H2(g)

since we know that magnesium reacts with steam to form magnesium oxide as in ii)?

Thanks!

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

chemistry - When 11.0 g of calcium metal is reacted with water, 5.00 g of ...
college chemistry - 1) If 740. mL of 0.06622 M aqueous NaI and 370. mL of 0....
Chemistry - The combustion of methane gives carbon dioxide and water. CH4 + O2...
chemistry - If 380. mL of 0.4294 M aqueous CaBr2 and 250. mL of 0.5880 M aqueous...
chemistry - Calcium oxide reacts with water in a combination reaction to produce...
chemistry - 1)The reaction of methane and oxygen yields carbon dioxide gas and ...
chemistry - Balance the word equation solid calcium carbonate reacts with ...
Chemistry - I am translating the sentence "HF can be added to calcium carbonate ...
chemistry - I had this on a test, not sure how to do it Explain, using balanced ...
Chemistry - Calcium oxide reacts with water in a combination reaction to produce...

Search
Members