this is a lab i am working on and this is what is says:
Solution A is mixed with water to produce solutions of varying concentration. These altered concentrations of solution A is added to a set amount of solution B and the reaction times are noted when the solutions are mixed.
Then i am given a table of results.
What i am supposed to do is Calculate the concentration of solution A in each reaction.
How do I do this???
reaction time is dependent on concentration, see http://www.science.uwaterloo.ca/~cchieh/cact/c123/coneffec.html
So you have to know the balanced reaction to figure the rate equation as in the link. It could be linear, a second order rate change, or ...
To calculate the concentration of solution A in each reaction, you can follow these steps:
1. Determine the molarity of solution B: The concentration of solution B is given, so you can directly use this value.
2. Determine the initial volume of solution B: You should have been given the volume of solution B used in each reaction. Note this down for each reaction.
3. Calculate the moles of solution B: Multiply the molarity of solution B by the number of moles of solution B used (moles = molarity * volume in liters).
4. Determine the final volume of the mixed solution: This is the sum of the volumes of solution A and solution B used in each reaction.
5. Determine the final concentration of solution A:
a. Subtract the moles of solution B from the total moles of the mixed solution (using the mole ratio, assuming the reaction between solution A and solution B is stoichiometric).
b. Divide the remaining moles of solution A by the final volume of the mixed solution to get the concentration of solution A in each reaction (concentration = moles / volume in liters).
Repeat these steps for each reaction in the table, using the given values for molarity, volumes, and any additional information provided.