Imagine that you mix 50 g of a solute with 100 g of water at 40 degree C.

Classify each solute by whether it would completely or partially dissolve under these conditions.

-KCl
-KClO3
-K2Cr2O3
-KNO3
-NaNO3
-Pb(NO3)2

I need help understanding the relationship or what it means for a solute to completely dissolve or partially dissolve at a certain temperature and solubility(g solute/100 g H2O).

completely dissolved-KNO3, NaNO3, Pb(NO3)2

partially dissolved-KCl, KClO3, K2Cr2O3

When a solute dissolves in a solvent, such as water, it means that the solute particles separate and become uniformly distributed throughout the solvent. The solubility of a solute refers to the maximum amount of solute that can dissolve in a given amount of solvent at a specific temperature.

In order to determine whether a solute will completely or partially dissolve at a certain temperature, you can compare the solubility of the solute with the amount of solute being added.

1. KCl (Potassium Chloride):
- Solubility: Approximately 34.2 g/100 g H2O at 40°C
- In this case, you are adding 50 g of KCl to 100 g of water. Since the solubility of KCl is greater than the amount of KCl being added, the KCl will completely dissolve in the water.

2. KClO3 (Potassium Chlorate):
- Solubility: Approximately 3 g/100 g H2O at 40°C
- In this case, you are adding 50 g of KClO3 to 100 g of water. Since the solubility of KClO3 is less than the amount of KClO3 being added, the KClO3 will partially dissolve in the water. Some of it will dissolve, but there will be undissolved KClO3 remaining.

3. K2Cr2O3 (Potassium Chromate):
- Solubility: Approximately 105 g/100 g H2O at 40°C
- In this case, you are adding 50 g of K2Cr2O3 to 100 g of water. Since the solubility of K2Cr2O3 is greater than the amount of K2Cr2O3 being added, the K2Cr2O3 will completely dissolve in the water.

4. KNO3 (Potassium Nitrate):
- Solubility: Approximately 62 g/100 g H2O at 40°C
- In this case, you are adding 50 g of KNO3 to 100 g of water. Since the solubility of KNO3 is greater than the amount of KNO3 being added, the KNO3 will completely dissolve in the water.

5. NaNO3 (Sodium Nitrate):
- Solubility: Approximately 88 g/100 g H2O at 40°C
- In this case, you are adding 50 g of NaNO3 to 100 g of water. Since the solubility of NaNO3 is greater than the amount of NaNO3 being added, the NaNO3 will completely dissolve in the water.

6. Pb(NO3)2 (Lead Nitrate):
- Solubility: Approximately 235 g/100 g H2O at 40°C
- In this case, you are adding 50 g of Pb(NO3)2 to 100 g of water. Since the solubility of Pb(NO3)2 is greater than the amount of Pb(NO3)2 being added, the Pb(NO3)2 will completely dissolve in the water.

To summarize, KCl, K2Cr2O3, KNO3, NaNO3, and Pb(NO3)2 will completely dissolve in water at 40°C, while KClO3 will partially dissolve, leaving some undissolved solute.

To understand whether a solute will completely or partially dissolve in a solvent at a given temperature, we need to consider its solubility. Solubility refers to the maximum amount of solute that can dissolve in a certain amount of solvent at a particular temperature.

In general, if the solute's solubility (in grams of solute per 100 grams of water) is greater than the amount of solute being added, it means the solute will completely dissolve. On the other hand, if the solute's solubility is less than the amount of solute being added, it will only partially dissolve.

Let's apply this to the given substances:

KCl: The solubility of KCl at 40°C is around 34 g/100 g H2O. Since we have 50 g of KCl, which is less than its solubility, KCl will completely dissolve under these conditions.

KClO3: The solubility of KClO3 at 40°C is around 70 g/100 g H2O. We have 50 g of KClO3, which is also less than its solubility. Therefore, KClO3 will also completely dissolve.

K2Cr2O3: The solubility of K2Cr2O3 at 40°C is around 1.8 g/100 g H2O. Since we have 50 g of K2Cr2O3, which is significantly greater than its solubility, K2Cr2O3 will only partially dissolve.

KNO3: The solubility of KNO3 at 40°C is around 62 g/100 g H2O. We have 50 g of KNO3, which is less than its solubility. Therefore, KNO3 will completely dissolve.

NaNO3: The solubility of NaNO3 at 40°C is around 88 g/100 g H2O. We have 50 g of NaNO3, which is less than its solubility. Hence, NaNO3 will also completely dissolve.

Pb(NO3)2: The solubility of Pb(NO3)2 at 40°C is around 112 g/100 g H2O. We have 50 g of Pb(NO3)2, which is less than its solubility. So, Pb(NO3)2 will completely dissolve.

To summarize, KCl, KClO3, KNO3, NaNO3, and Pb(NO3)2 will completely dissolve in water at 40°C, while K2Cr2O3 will only partially dissolve.

idk

idk
idk
you tell me
idk
idk