Question

A technologist is ask to prepare 100 mL of a 5% (v/v) concentration of sodium hypochloride. How much solute should they add to the concentrated sodium hypochloride? A CLS needs to make a 1 to 10 dilution with a total volume of 100.0 mu L. How many mu L of patient serum must be used to make this dilution? Consider if you wanted to make 1.00 L of a 0.200 M solution of Na3PO4 (163.94 g). How many grams of. Na3PO4 would you need? The gram molecular weight of creatine is 113.12. Given a 2.00 mg/dL creatine standard, what is the concentration in millimoles per liter? How many grams of NaOH are needed to make 30.0% w/w solution using deionized water as a solvent? 500 mL of a 20% w/v EtOH solution is needed. In the stock room is a bottle of 80% w/v EtOH. How many mL of the 80% w/v EtOH are needed? Given a 60% T (Transmittance) reading on a spectrophotometer, what is the absorbance value? A manual glucose assay is performed using a single 150 mg/dL standard. Upon analysis, the absorbance of the standard is 0.465. the absorbance of the patient's sample is 0.338. What is the concentration of the patient's glucose sample in mg/dL?

Answer 1

First two are correct. 3. Num ber of moles of solution 0200 mol =0.200 mol 1.00Lx 163.94832.79 g Mass of NaP0.200 mol xe3 4 concentrati on in millimoles per liter 2,00 =1.77 x 104 mol/L mol mg1g10 dL 1 mol dL 1000 mg 1L 113.12g