using the above solubility curve, answer the given questions. 1. which salt shown on the solubility curve is the least soluble in water at 10°c? 2. which of the salts shown on the graph has the greatest increase in solubility as the temperature increases from 30°c to 60°c? curve is the least soluble in water at 10°c? 3. which of the salts has its solubility affected the least by a change in temperature? 4. which two salts have the same degree of solubility at about 85°c? affected the least by a change in temperature? 5. to what temperature would you heat 80 g of kno₃ in 100 ml of water to dissolve completely?

Question

Accepted Answer

### Question 1
# Brief Explanations:
To determine the least soluble salt at $10^\circ\text{C}$, we examine the solubility curve. At $10^\circ\text{C}$, the salt with the lowest solubility (lowest y - value on the curve) is $KClO_3$ (or potentially other low - solubility salts at this temperature, but from the curve, $KClO_3$ has a very low solubility at $10^\circ\text{C}$ compared to others like $KNO_3$, $KI$, etc.).
# Answer:
$KClO_3$ (or other correct salt based on the curve, but $KClO_3$ is a common answer here)

### Question 2
# Brief Explanations:
To find the salt with the greatest increase in solubility from $30^\circ\text{C}$ to $60^\circ\text{C}$, we calculate the difference in solubility (y - axis values) for each salt between these two temperatures. For $KNO_3$, the solubility at $30^\circ\text{C}$ is relatively low and at $60^\circ\text{C}$ is much higher. The slope of the solubility curve for $KNO_3$ between $30^\circ\text{C}$ and $60^\circ\text{C}$ is steeper than for other salts, indicating a larger increase in solubility.
# Answer:
$KNO_3$

### Question 3
# Brief Explanations:
A salt whose solubility is affected the least by temperature change has a nearly flat solubility curve. $NaCl$ has a solubility curve that changes very little as temperature varies. By comparing the slopes of the solubility curves of all salts, $NaCl$'s curve has the smallest slope (least change in solubility with temperature).
# Answer:
$NaCl$

### Question 4
# Brief Explanations:
To find two salts with the same solubility at about $85^\circ\text{C}$, we look at the solubility curve at $x = 85^\circ\text{C}$ (on the x - axis). We check the y - values (solubility) of different salts. At around $85^\circ\text{C}$, $KNO_3$ and $KI$ (or other pairs, but from the curve, these two often have similar solubility at this temperature) have approximately the same solubility.
# Answer:
$KNO_3$ and $KI$ (or other correct pair based on the curve)

### Question 5
# Explanation:
## Step 1: Understand the problem
We need to find the temperature at which $80\space g$ of $KNO_3$ dissolves completely in $100\space mL$ of water. Since the solubility is given as amount of solute per $100\space g$ (or $100\space mL$, as the density of water is approximately $1\space g/mL$) of water, we need to find the temperature where the solubility of $KNO_3$ is at least $80\space g$ per $100\space mL$ of water.

## Step 2: Analyze the solubility curve
We look at the solubility curve for $KNO_3$. We find the point on the $KNO_3$ curve where the solubility (y - axis) is $80\space g$ per $100\space g$ of water. By moving horizontally from $y = 80$ until we hit the $KNO_3$ curve, and then moving down to the x - axis (temperature), we find that the temperature is approximately $50^\circ\text{C}$ (the exact value can be read from the curve, and around $50^\circ\text{C}$, the solubility of $KNO_3$ is about $80\space g$ per $100\space mL$ of water).
# Answer:
Approximately $50^\circ\text{C}$ (the exact value may vary slightly depending on the curve reading, but around $50^\circ\text{C}$ is correct)

Sovi.AI - AI Math Tutor

QUESTION IMAGE

Question

Explanation:

Question 1

Answer:

Question 2