All measurements can also be accomplished using a kitchen scale instead of measuring cups. If students assume the density of both vinegar and distilled water are 1 g/mL, 100 mL can be measured by weighing 100 grams of vinegar in a container which has been tared on the scale. 400 grams of water can be measured to achieve 400 mL, and the vinegar can be added to water. However, students should be aware that the density of vinegar is not exactly 1 g/mL and that this is a source of error in their experiment if they use this method.