Imagine you had prepared a 0.1 M sodium phosphate solution. Would you expect it to have a
conductivity value that was the same, higher than or lower than the 0.1 M sodium chloride
solution? Explain your answer .

Consider a culture medium on which only gram-positive organisms such as staphylococcus aureus colonies can grow due to an elevated nacl level. a yellow halo surrounds the growth, indicating the bacterium fermented a sugar in the medium, decreasing the ph as a result and changing the color of a ph indicator chemical. this type of medium would be referred to as a differential and enrichment culture.