The molarity of a solution is the number of moles of solute in exactly one liter of total solution, and molality is described as the number of moles of solute in exactly 1 kilogram of solvent. Answer the following questions about solution concentrations. D 250.0 grams 3. 55.5 grams of K 2 CO 3 are dissolved in enough water to make 500 milliliters of solution. D 0.05 m A variety of staining techniques are routinely used in the microbiologry laboratory to identify bacteria.
Some stains are simple stains while others are differential.
Many of the basic dyes used bind to the bacterial cell due to its negatively charged surface. Other dyes may be repelled by the cell and can be used to produce a negative stain. The choice of technique depends on the type of information needed. The information is routinely used to help identify microorganisms, and it also helps determine appropriate therapeutic treatment. B the Gram stain.