To find the molarity of KBr in the final solution, we need to calculate the moles of KBr in each sample and then determine the total moles of KBr in the final solution.
Step 1: Calculate the moles of KBr in the first sample.
Using the formula: moles = concentration × volume
moles1 = 1.20 M × 36.0 mL = 43.2 mmol (millimoles)
Step 2: Calculate the moles of KBr in the second sample.
moles2 = 0.700 M × 56.0 mL = 39.2 mmol
Step 3: Determine the total moles of KBr.
total moles = moles1 + moles2
total moles = 43.2 mmol + 39.2 mmol = 82.4 mmol
Step 4: Calculate the molarity of KBr in the final solution.
molarity = moles / volume
molarity = 82.4 mmol / 60.0 mL = 1.37 M
Therefore, the molarity of KBr in the final solution is 1.37 M.