Solve for K2Cr2O7 in Solution Calculation Homework

  • Thread starter mmmeraki
  • Start date
  • Tags
    Calculation
In summary, to solve for K2Cr2O7 in solution calculation homework, you will need to use the formula: K2Cr2O7 = (mL of solution)(Molarity of solution)(Volume of solution)/(mL of K2Cr2O7). The purpose of this calculation is to determine the concentration of K2Cr2O7 in a given solution. The units for K2Cr2O7 are typically expressed in moles per liter (mol/L) or molarity (M). Factors that can affect the accuracy include human error, impurities, and changes in temperature or pressure. To check your work, double check your calculations and units, and ask for feedback from a classmate or teacher.
  • #1
mmmeraki
5
0

Homework Statement


How many grams of K2Cr2O7 (350 g 6,50%) must be added to get saturate the solution at 20C (12,6 g/100 g)?

Homework Equations



The Attempt at a Solution


350 g x 0,065 = 22,75 K2Cr2O7
I got 10 g, but it's not correct. The correct answer is 18,5 g.
 
Last edited:
Physics news on Phys.org
  • #2
You calculated the amount of the dichromate already present, not the amount that has to be added to saturate the solution.
 

1. How do I solve for K2Cr2O7 in solution calculation homework?

To solve for K2Cr2O7 in solution calculation homework, you will need to use the following formula: K2Cr2O7 = (mL of solution)(Molarity of solution)(Volume of solution)/(mL of K2Cr2O7). This will give you the concentration of K2Cr2O7 in the solution.

2. What is the purpose of solving for K2Cr2O7 in solution calculation homework?

The purpose of solving for K2Cr2O7 in solution calculation homework is to determine the concentration of K2Cr2O7 in a given solution. This information is important in understanding the chemical reactions and properties of the solution.

3. What are the units for K2Cr2O7 in solution calculation homework?

The units for K2Cr2O7 in solution calculation homework are typically expressed in moles per liter (mol/L) or molarity (M).

4. What factors can affect the accuracy of the K2Cr2O7 solution calculation?

There are several factors that can affect the accuracy of the K2Cr2O7 solution calculation, including human error in measuring and recording data, impurities in the solution, and changes in temperature or pressure.

5. How can I check my work when solving for K2Cr2O7 in solution calculation homework?

The best way to check your work is to double check your calculations and make sure you have used the correct formula and units. You can also ask a classmate or teacher to review your work and provide feedback.

Similar threads

  • Biology and Chemistry Homework Help
Replies
7
Views
4K
  • Biology and Chemistry Homework Help
Replies
14
Views
8K
  • Biology and Chemistry Homework Help
Replies
2
Views
2K
  • Biology and Chemistry Homework Help
Replies
2
Views
2K
  • Biology and Chemistry Homework Help
Replies
3
Views
1K
  • Biology and Chemistry Homework Help
Replies
5
Views
2K
  • Biology and Chemistry Homework Help
Replies
3
Views
2K
  • Biology and Chemistry Homework Help
Replies
7
Views
2K
  • Biology and Chemistry Homework Help
Replies
1
Views
1K
  • Biology and Chemistry Homework Help
Replies
3
Views
2K
Back
Top