A laboratory is well-stocked with 1. 0 m h2so4 and 6. 0 m h2so4, but 500 ml of 2. 5 m h2so4 are needed for an experiment. Unfortunately, the water supply has been temporarily cut off, so the 2. 5 m solution must be made from the existing solutions. How many milliliters of 1. 0 m and 6. 0 m h2so4 must be mixed in order to prepare 500 ml of 2. 5 m solution?.