If 30 grams of KCl is dissolved in 100 grams of water at 40 degrees celsius, how many additional grams of KCl would be needed to make the solution saturated at 80 degrees celsius?

30 grams

How many grams of KCl can dissolve in 100 g of water at 30oC?

If 30 grams of KCl are dissolved in 100 grams of water at 50 degrees Celsius, the solution can be best described as

To determine the additional grams of KCl needed to make the solution saturated at a different temperature, we first need to understand the concept of solubility. Solubility is the maximum amount of solute (in this case, KCl) that can dissolve in a given amount of solvent (in this case, water) at a particular temperature.

To find the solubility of KCl at 40 degrees Celsius, we can consult a solubility chart or database. Let's assume that at 40 degrees Celsius, the solubility of KCl is 25 grams per 100 grams of water.

Given that you already have 30 grams of KCl dissolved in 100 grams of water at 40 degrees Celsius, the solution is already saturated. No additional grams of KCl are needed at this temperature.

Now, let's move on to finding the additional grams of KCl needed to make the solution saturated at 80 degrees Celsius.

Again, we need to determine the solubility of KCl at 80 degrees Celsius. Assuming the solubility chart or database states that the solubility of KCl at this temperature is 60 grams per 100 grams of water, we can calculate the additional grams of KCl needed.

At 80 degrees Celsius, the mass of water remains constant at 100 grams. To calculate the additional grams of KCl, we subtract the amount of KCl already dissolved in the solution:

Solubility at 80 degrees Celsius - Amount of KCl already dissolved at 40 degrees Celsius
= (60 grams/100 grams of water) - (30 grams/100 grams of water)
= 60 grams - 30 grams
= 30 grams

Therefore, to make the solution saturated at 80 degrees Celsius, you would need an additional 30 grams of KCl.

Please note that the actual solubility of KCl at different temperatures might vary based on various factors, and it is always recommended to consult reliable sources or experimental data for accurate values.

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