A chemistry student weighs out 1.30 kg of an unknown solid compound X\' and adds

Question

A chemistry student weighs out 1.30 kg of an unknown solid compound X' and adds it to 2,00 L of distilled water at 15 degree C. After 10 minutes of stirring. only some of the .X has dissolved. The student drains off the solution, then washes, dries and weighs the X that did not dissolve. It weigh 1.04 kg. Using only the information above, can you calculate the solubility of X in water at 15.degree C? yes no If you said yes. calculate it. Be sure your answer has a unit symbol and the right number of significant digits.

Explanation / Answer

Yes , the solubility of the X in water can be calculated using the information given

now

mass of compound X taken initially = 1.3 kg

mass of undissolved compound X = 1.04 kg

so

mass of compound X dissolved = initial mass taken - mass undissolved

mass of compound X dissolved = 1.3 - 1.04

mass of compound X dissolved = 0.26 kg

now

volume of water taken = 2 L

now

solubility of the compound X = mass of compound X dissolved / volume of water

solubility of the compound X = 0.26 / 2

solubility of the compound X = 0.13 Kg / L

so

the solubility of the compound X is 0.13 kg/L

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