Answer:
0.075 M.
Explanation:
- It is a dilution process.
- We have the rule states that the no. of millimoles before dilution is equal to the no. of millimoles after dilution.
(MV) before dilution = (MV) after dilution
M before dilution = 0.90 M.
V before dilution = 25.0 mL.
M after dilution = ??? M.
V after dilution = V of HCl + V of water added = 25.0 mL + 275.0 mL = 300.0 mL.
∴ M after dilution = (MV) before dilution / V after dilution = (0.90 M)(25.0 mL) / (300.0 mL) = 0.075 M.
