A saturated solution of potassium nitrate in water is prepared at 70.0*C then cooled to 55.0*C how many grams of potassium nitrate crystallized--- how do I determine this using my graph with everyone's numbers
It is not sufficient
I have no idea what your graph shows. However, if you can read from the graph these figures I can show you how to use them.
solubility KNO3 (grams/100cc) at 70.0 C (call this A)
Solubility KNO3 (grams/100 cc) at 55 0 C.(call this B)
Therefore, at 70.0 C you will have that A grams/100 cc dissolved.
When you cool it to 55.0 C, the solubility is B grams/100 cc. Then A-B will be the amount that crystallizes.
To determine the amount of potassium nitrate crystallized, you can use the solubility curve graph for potassium nitrate in water. The solubility curve shows how the solubility of a compound changes with temperature.
Step 1: Plot the given points on the graph
Plot the point (70.0°C, solubility at 70.0°C) and (55.0°C, solubility at 55.0°C) on the solubility curve graph.
Step 2: Connect the two points on the graph
Draw a straight line connecting the two plotted points on the graph.
Step 3: Find the solubility of potassium nitrate at 70.0°C and 55.0°C
Read the solubility values on the vertical axis (y-axis) at the two temperature points you plotted.
Step 4: Calculate the difference in solubility
Subtract the solubility value at 55.0°C from the solubility value at 70.0°C to find the difference.
Step 5: Convert the difference in solubility to grams
Multiply the difference in solubility by the volume of the solution (in liters) to find the amount of potassium nitrate that crystallized. If the volume of the saturated solution is not given, you won't be able to calculate the mass.
It is important to note that without specific solubility values or volume information, it is not possible to provide an exact answer.
To determine the amount of potassium nitrate that crystallized, you will need to refer to the solubility curve graph for potassium nitrate in water. The solubility curve provides information on how much solute can dissolve in a given amount of solvent at different temperatures.
Here's how you can use the graph to find the amount of potassium nitrate that crystallized:
1. Identify the points on the graph that correspond to the given temperatures, 70.0°C and 55.0°C. Locate these temperature values on the x-axis of the graph.
2. Trace vertically from each temperature point to the solubility curve line on the graph.
3. At each temperature, determine the solubility of potassium nitrate, which is given in grams of solute per 100g of water. Read the value on the y-axis of the graph corresponding to each temperature.
4. Calculate the difference between the two solubility values. This difference represents the amount of potassium nitrate that crystallized when the solution was cooled from 70.0°C to 55.0°C.
It's important to note that the solubility curve graph is a general representation of solubility. Deviations from the graph can occur depending on the purity, impurities, and other factors.