A coffee shop attendant added the instant coffee powder to hot water until no more would dissolve. He added 30g of powder to 100mL of water. What is the solubility of the instant coffee powder in hot water?
30 g/100 mL
To find the solubility of the instant coffee powder in hot water, we need to calculate the amount of coffee powder that can dissolve in a given amount of water. In this case, the coffee shop attendant added 30g of powder to 100mL of water.
The solubility can be expressed as the ratio of the amount of solute (coffee powder) to the amount of solvent (water). In this case, the solubility can be calculated as:
Solubility = (mass of solute) / (volume of solvent)
In the given example, the mass of the solute (coffee powder) is 30g, and the volume of the solvent (water) is 100mL.
Solubility = 30g / 100mL
To obtain the answer, you would divide 30g by 100mL:
Solubility = 0.3 g/mL
So, the solubility of the instant coffee powder in hot water is 0.3 grams per milliliter.