what mass of ammonium chloride can be added to 100g of water at 20 degrees C before the solution becomes saturated
The solubility of a solute (ammonium chloride) in a solvent (water) is the maximum mass of the solute that can dissolve in 100 ml. of solvent at the given temperature.
The solubility of ammonium chloride in water at 20 degrees C is 37.2 g. according to Wikipedia, under ammonium chloride.
so what do i write as the answer
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To determine the mass of ammonium chloride that can be added to 100g of water at 20°C before the solution becomes saturated, we need to know the solubility of ammonium chloride at that temperature.
The solubility of ammonium chloride in water is the maximum amount of ammonium chloride that can dissolve in a given amount of water at a specific temperature.
To find the solubility, we can consult a solubility table or use a reference book. In this case, the solubility of ammonium chloride in water at 20°C is about 37g/100g of water.
Now, if the solution becomes saturated, it means that no more ammonium chloride can dissolve in the water at that temperature.
Therefore, the mass of ammonium chloride that can be added to 100g of water at 20°C before the solution becomes saturated is equal to the solubility, which is 37g/100g of water.
Look at the answer PC gave you. He defines saturated solution AND tells you the solubility of NH4Cl. What else is there to know?
411 grams
Unfortunately this is not the intended answer.
Could you please show how you got 411 grams?