Question

when you make your four solutions for this experiment you will be adding 10 mL of methyl red solution some other chemicals and finally diluting to 100 ml what is the concentration of methyl red in each of your four solutions?

2. When you make your four solutions for this experiment, you will be adding 10 ml of methyl d solution, some other chemicals, and finally diluting to 100 mL. What is the concentration re of methyl red in each of your four solutions? (This is the value [MR] you will use in your final calculations.)

Answer 1

Volume of Methyl Red solution = 10 ml Density of methyl red = 0.791 g/mL Mass = density mass volume = 0.791 g/mL 10 times mL = 7.91 g Molecules mass of Methyl red = 269.30 g mol^-1 Number of moles = mass/molecular mass Number of moles of methyl red = 7.91 g/269.30 g mol^-1 = 0.0284 mol Molarity = number of moles/solution in litres = 0.0294 mol/100 mL 2.94 M concentration of methyl red in your solution is 2.94 M