96. Give the balanced equation for each of the following. a. The combustion of e
ID: 503739 • Letter: 9
Question
96. Give the balanced equation for each of the following. a. The combustion of ethanol (C2H5OH) forms carbon diox- ide and water vapor. A combustion reaction refers to a re action of a substance with oxygen gas. b. Aqueous solutions of lead(II) nitrate and sodium phos- phate are mixed, resulting in the precipitate formation of lead(II) phosphate with aqueous sodium nitrate as the other product. c. Solid zinc reacts with aqueous HCl to form aqueous zinc chloride and hydrogen gas d. Aqueous strontium hydroxide reacts with aqueous hydro bromic acid to produce water and aqueous strontium bromide.Explanation / Answer
96 a)
Ethanol (C2H2OH) is composed of C, H and O. So, the usual products of its combustion should be CO2 and H2O.
The unbalanced equation is: C2H5OH + O2 ----> CO2 + H2O
Since both C and H are appearing at only once place each side, they should be balanced first by making the coefficients of CO2 and H2O as 2 and 3. Now, the number of O atoms on the products side becomes 7, and it is balanced by taking the coefficient of O2 as 3 on the left side.
The balanced equation for the combustion process is:
C2H5OH + 3O2 ----> 2CO2 + 3H2O
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