Please check! Thanks! Name Lab Section CHEM 281 Experiment 4 Pre-lab This pre-la
ID: 1080900 • Letter: P
Question
Please check! Thanks! Name Lab Section CHEM 281 Experiment 4 Pre-lab This pre-lab must be completed before the start of your lab section 1. Define the term "titration" 2. What is the purpose of the indicator in a titration? 3. A student wants to make 500.0 mL of a 0.0250 N NaOH solution from a 19.0 N NaOH stock solution. How much of the concentrated 19.0 N NaOH stock solution is needed to make the dilute solution? Show your calculation with all work below. 4, A student wishes to standardize a solution of NaOH·They obtain a 25.0 mL sample of 0.500 N HCI to titrate. If it takes 21.0 mL of NaOH to neutralize the sample of HCl, what is the normality of the NaOH solution? Show your calculation with all work below .omL : . 02101 con + a . ^-e ,n o.012 mo ' S Ne. O 4 5. Now that they know the concentration of the NaOH solution, the student uses it to titrate a 25.0 mL sample urine from patient A. If it takes 12.5 mL of the NaOH to neutralize all the acid in the urine, what is the normality of the acid in the urine? Show your calculation with all work below O.00 744 mo 6. To make a comparison of the acidity of patient A's urine with other patients a little easier, it is necessary to determine how many mL of O.1 N HCI would be equivalent to 1500 mL of patient A's urine. Show your calculation with all work below. *1500 mL is the amount of urine normally produced in 24 hours. o-398 x 1500 1000 SPRING. 20Explanation / Answer
Ans 1 :
Titration is a chemical procedure which is often used in the laboratories to determine the concentration of the unknown solution by the help of volume and concentration of the known solution.
It is also known as titrimetry , which is normally used for qualitative or volumetric analysis of the identified analyte.