THE difficulties in the way of determining the hydrogen ion concentration of the interior of plant cells are great and they have retarded any real advance in our knowledge of the operation of hydrogen ...

a dilute solution contains a relatively small amount of dissolved solute in a given volume a concentrated solution contains a relatively large amount of dissolved solute in a given volume Take care to ...

Chromatography is the science of separating molecules of interest to identify, quantify or even purify them. Properties of the target molecules such as their solubility, size or hydrophobicity give ...

Take care to use the word 'dilute' correctly. It can be used as an adjective to describe the concentration of a solution (as here), or as a verb to describe the process of adding more water to a ...