Graduate Management Admission Test (GMAT) Practice Test

In mixing scenarios, what must be assessed to reach the total substance requirement accurately?

1. The pH level of each liquid

2. The exact mixing order of liquids

3. The ratio of each liquid's concentration

4. The cost efficiency of each liquid

The correct answer is: The ratio of each liquid's concentration

To accurately reach the total substance requirement in mixing scenarios, it is essential to assess the ratio of each liquid's concentration. This is because the concentrations of the liquids involved directly influence the final concentration of the mixture. When liquids with different concentrations are combined, the total amount of the substance in the mixture depends on both the volume and the concentration of each component. Understanding the ratio allows one to calculate how much of each liquid is needed to achieve a desired final concentration, ensuring that the total substance aligns with the requirements laid out. If the ratio is not considered, it becomes challenging to ascertain if the final mixture meets the target concentration, potentially leading to an incorrect conclusion about the total substance present in the mixture. Other factors, like pH levels or the mixing order, may be important in specific contexts but do not have a direct impact on calculating the total quantity of the substance in terms of concentration. Additionally, while cost efficiency can influence resource selection, it does not affect the accuracy of meeting the total substance requirement in the mixture.