Explain how you would make up a one molar (1m) solution of ethyl alcohol.
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Ответ:
The formula of molarity is:
Number of moles is given as:
So, the formula of molarity can be written as:
Molar mass of ethyl alcohol,
= ![2\times 12+6\times 1+16 = 46 g/mol](/tpl/images/0073/9500/4ea93.png)
Molarity of ethyl alcohol,
= 1 molar (given)
Let the volume of solvent that is water be 1 L.
Substituting the values in formula (1):
Since, ethyl alcohol is liquid in room temperature:
Density of ethyl alcohol is![0.7892 g/mL](/tpl/images/0073/9500/34d22.png)
Density =![\frac{mass}{volume}](/tpl/images/0073/9500/cfd74.png)
So, volume of ethyl alcohol =![\frac{mass of ethyl alcohol}{density of ethyl alcohol}](/tpl/images/0073/9500/59a20.png)
Volume of ethyl alcohol =![\frac{46 g}{0.7892 g/mL}](/tpl/images/0073/9500/f5ff0.png)
Volume of ethyl alcohol =![58.29 mL](/tpl/images/0073/9500/ef36e.png)
Hence, by dissolving 58.29 mL of ethyl alcohol in 1 L of water, 1 M solution of ethyl alcohol can be prepared.
Ответ:
3
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1
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6
5
not a 100% sure but i think this is it.