Why do we crush solids before putting them into a solvent?

2 answers:

7 0

The answer is to increase the surface area of the solute.
You see it dissolves faster because there is a lot more water touching it when it is has a higher surface area.This can be achieved by crushing

Arisa [49]3 years ago

5 0

Answer: Option (c) is the correct answer.

Explanation:

When we crush a solute then there will be increase in number of solute particles. This means that there is increase in surface area of solute particles.

Hence, more is the surface area of solute particles more will be the collisions between solute and solvent particles. Therefore, more will be rate of reaction.

Thus, we can conclude that we crush solids before putting them into a solvent to increase the surface area of the solute.

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What volume of lead (of density 11.3 g/cm3 ) has the same mass as 395 cm3 of a piece of redwood (of density 0.38 g/cm3 )? Answer

Zepler [3.9K]

$d_{1}=\frac{m}{V_{1}}\\\\
V_{1}=395cm^{3}\\
d_{1}=0,38\frac{g}{cm^{3}} \ \ \ \ \Rightarrow \ \ \ \ m=395cm^{3}*0,38\frac{g}{cm^{3}}=150,1g\\\\\\
d_{2}=\frac{m}{V_{2}}\\\\
m=150,1g\\
d_{2}=11,3\frac{g}{cm^{3}} \ \ \ \ \Rightarrow \ \ \ \ V_{2}=\frac{150,1g}{11,3\frac{g}{cm^{3}}}\approx13,28cm^{3}$