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vampirchik [111]
3 years ago
10

Washing filtrate with sodium bicarbonate

Chemistry
1 answer:
Effectus [21]3 years ago
5 0
Usually, filtrates are washed with a sodium bicarbonate solution to remove any acidic impurities from the filtrate 

Hope that helps 
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Which of the following is the best example of a scientific law?
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Answer:

The correct answer is :'The gravitational force between two objects is related mathematically to their mass and the distance between them'.

Explanation:

A scientific law is a statement which explains physical phenomena and has been tested multiple times through the correct scientific methods and experimentation. It will give same results and observations after each conduct.

A scientific law comes into picture after the acceptance of a theory which explains or exposes the reason behind any physical phenomena occurrence.

So the best example of scientific law:

The gravitational force between two objects is related mathematically to their mass and the distance between them.

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If the volume of wet gas collected over water is 85.0 mL at 20°C and 760 mm Hg , what is the volume of dry gas at STP conditions
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Combined gas law is the combination of Boyle's law, Charles's law and Gay-Lussac's law.

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\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}

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P_2 = final pressure of dry gas at STP =  760 mm Hg

V_1 = initial volume of dry gas = 85.0 mL

V_2 = final volume of dry gas at STP = ?

T_1 = initial temperature of dry gas = 20^oC=273+20=293K

T_2 = final temperature of dry gas at STP = 0^oC=273+0=273K

Now put all the given values in the above equation, we get the final volume of wet gas at STP

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