Astudent must make a buffer solution with a ph of 1.00. determine which weak acid is the best option to make a buffer at the specified ph. formic acid, ka = 1.77 x 10−4, 2.00 m acetic acid, ka = 1.75 x 10−5, 5.00 m sodium bisulfate monohydrate, ka = 1.20 x 10−2, 3.00 m propionic acid, ka =1.34 x 10−5, 3.00 m

he uptake of drugs from the intestine is often strongly influenced by diffusion. for example, consider a water-insoluble steroid for treating inflammation that is solubilized in aggregates of detergent molecules, called micelles. these micelles, aggregates of 80 soap molecules, have a molecular weight of 24,000, a diameter of 2.6 nm, and a charge of -27. the positively charge ions (counterions) in this system are na".

qualitative observation deals with data that can be observed with our senses: sight, smell, touch, taste, and hearing. they do not involve measurements or numbers. for instance, colors, shapes, and textures of objects are all qualitative observations.