Homework Answers
The biggest mistake possible in the standardisation of NaOH is the Volume of potassium terephthalate titrated witht eh NaOH as there will always be a delay in the indicator changing color and you turning off the burette. In order to improve your results, you could try to slow the drip as the volume approaches the close to your approximate volume obtained before. This is also reduced by taking an average of at least 3 readings, eliminating error to some extent.
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4. Describe the results you obtained. What was the largest source of error (uncertainty) in your...
In this experiment, you will identify an unknown weak acid by titration with standardized base. This...
In this experiment, you will identify an unknown weak acid by titration with standardized base. This lab takes place in two parts, which you can do in either order: 1. Standardization of a sodium hydroxide solution to find its actual concentration (approximately 0.1 M) 2. Titration of the weak acid with the sodium hydroxide solution. You won't know if your acid is monoprotic (HA), diprotic (H2A), or triprotic (H3A). a.) Indicate how you would differentiate between the three different types...
In the lab of determining the peroxide w/v with KMnO4- What would be the effect on your results if: 1) Due to some error...
In the lab of determining the peroxide w/v with KMnO4- What would be the effect on your results if: 1) Due to some error that occurred during KMnO4 standardization, the KMnO4 concentration you used for your calculations was higher than that actually used in the titration? 2)The amount of water that was used to dilute your titration mixtures was always about 20% higher than the recommended 100mL in the procedure? 3) You transferred 10% too much peroxide unknown to the...
In the Titration Lab, how would it affect your results if you used a beaker with...
In the Titration Lab, how would it affect your results if you used a beaker with residual water in it to measure out your standardized sodium hydroxide solution?
figure 2.3 EXPERIMENT Experimental Uncertainty (Error) and Data Analysis 2 Laboratory Report TI QUESTIONS 1. Read...
figure 2.3
EXPERIMENT Experimental Uncertainty (Error) and Data Analysis 2 Laboratory Report TI QUESTIONS 1. Read the measurements on the rulers in Fig. 2.9, and comment on the results Ruler 1 om 5 Ruler 2 cm 6 Ruler 3 TTm 6 Figure 2.9 2. Were the measurements of the block in part tb) of Procedure 2 all done with the same instrument? Explain. 3. Referring to the dart analogy in Fig. 2.3, draw a dart grouping that would represent poor...
Scenario: A reaction is taking place between sodium hydroxide and magnesium chloride to produce sodium chloride and...
Scenario: A reaction is taking place between sodium hydroxide and magnesium chloride to produce sodium chloride and magnesium hydroxide. Write the balanced equation for this reaction. If 50g of sodium hydroxide is being reacted with 4.30g of magnesium chloride, how many grams of magnesium hydroxide would be produced? Show all calculations. Which reactant was the limiting reactant in the above scenario? Since the precipitation occurs in solution, to verify the amount of magnesium hydroxide produced, the solid would need to be removed...
Chemistry lab"Calorimetry" Data: Insert data obtained from your TA here Mass of cups (g) 1 mass...
Chemistry lab"Calorimetry"
Data: Insert data obtained from your TA here Mass of cups (g) 1 mass of cold water & caps (9) 15.1839 Temp. of cold water (-() Temp of I mass of inxed water mited CC water tapscg) 41.6 1 81.4882 5.6195 Calculations and questions: 21.3 Detailed approach for temperature determination Describe in detail the approach you have chosen to make the temperature determination. Clearly indicate why other available materials were not used in your method. Sources of Error...
Error Propagation and Density of Materials I need you to finish the two columns(Don't worry about...
Error Propagation and Density of Materials
I need you to finish the two columns(Don't worry about the
third) in the table using the formulas in page one. Please show
work
3) Use the Vernier caliper to measure the height, h, and the diameter, D, of the cylinder. Record h and D and their uncertainties, Ah and AD. 4) the graduated cylinder Use metal. the determine of to the volume how would you do this? Analysis The density of a sample...
pre lab #2 & #3 vvith the end point of the titration, you can calculate the...
pre lab #2 & #3
vvith the end point of the titration, you can calculate the number on" of sodium hydroxide delivered from the stoichiometry. LEARNING OUTCOMES 1. Understand the concepts of an acid-base reaction and titration 2. Know what the end point is and how it applies to stoichiometry 3. Determine the acetic acid content in vinegar 4. Demonstrate correct titration technique 5. Use group data to draw a conclusion of the "best buy" brand of vinegar PRE-LABORATORY ASSIGNMENT...
The final step of experiment in Lab6 is to estimate the systematic uncertainty of your final...
The final step of experiment in Lab6 is to estimate the systematic uncertainty of your final measurement due to the variations of the parameters you measured in the lab. Equations (6.7) and (6, 8) in your lab manual give expressions for e/m and the relative error of e/m due to all of the parameters measured in the lab. (Sigma _e/m/e/m)^2 = (sigma _v/V)^2+(2 sigma _O/I^2+2 sigma _R/R)^2+(2 sigma _r/r))^2 Term # 1 2 3 4 Assume your mean measurements of...
Problem 1 (Short Answer) Answer the following questions in 2-4 sentences: a) Describe how uncertainty plays...
Problem 1 (Short Answer) Answer the following questions in 2-4 sentences: a) Describe how uncertainty plays a role in engineering measurements and experiments b) Explain what the variance of a dataset or random variable represents. c) Explain why normal distributions and normal random variables are used very commonly in engineering practice Describe what is meant by the rejection region of an alternative hypothesis, and sketch the rejection regions for the right-sided, left-sided, and two-sided alternatives d) Problem 2 (Health Data...
figure 2.3
EXPERIMENT Experimental Uncertainty (Error) and Data Analysis 2 Laboratory Report TI QUESTIONS 1. Read the measurements on the rulers in Fig. 2.9, and comment on the results Ruler 1 om 5 Ruler 2 cm 6 Ruler 3 TTm 6 Figure 2.9 2. Were the measurements of the block in part tb) of Procedure 2 all done with the same instrument? Explain. 3. Referring to the dart analogy in Fig. 2.3, draw a dart grouping that would represent poor...
Chemistry lab"Calorimetry"
Data: Insert data obtained from your TA here Mass of cups (g) 1 mass of cold water & caps (9) 15.1839 Temp. of cold water (-() Temp of I mass of inxed water mited CC water tapscg) 41.6 1 81.4882 5.6195 Calculations and questions: 21.3 Detailed approach for temperature determination Describe in detail the approach you have chosen to make the temperature determination. Clearly indicate why other available materials were not used in your method. Sources of Error...
Error Propagation and Density of Materials
I need you to finish the two columns(Don't worry about the
third) in the table using the formulas in page one. Please show
work
3) Use the Vernier caliper to measure the height, h, and the diameter, D, of the cylinder. Record h and D and their uncertainties, Ah and AD. 4) the graduated cylinder Use metal. the determine of to the volume how would you do this? Analysis The density of a sample...
pre lab #2 & #3
vvith the end point of the titration, you can calculate the number on" of sodium hydroxide delivered from the stoichiometry. LEARNING OUTCOMES 1. Understand the concepts of an acid-base reaction and titration 2. Know what the end point is and how it applies to stoichiometry 3. Determine the acetic acid content in vinegar 4. Demonstrate correct titration technique 5. Use group data to draw a conclusion of the "best buy" brand of vinegar PRE-LABORATORY ASSIGNMENT...
The final step of experiment in Lab6 is to estimate the systematic uncertainty of your final measurement due to the variations of the parameters you measured in the lab. Equations (6.7) and (6, 8) in your lab manual give expressions for e/m and the relative error of e/m due to all of the parameters measured in the lab. (Sigma _e/m/e/m)^2 = (sigma _v/V)^2+(2 sigma _O/I^2+2 sigma _R/R)^2+(2 sigma _r/r))^2 Term # 1 2 3 4 Assume your mean measurements of...
Problem 1 (Short Answer) Answer the following questions in 2-4 sentences: a) Describe how uncertainty plays a role in engineering measurements and experiments b) Explain what the variance of a dataset or random variable represents. c) Explain why normal distributions and normal random variables are used very commonly in engineering practice Describe what is meant by the rejection region of an alternative hypothesis, and sketch the rejection regions for the right-sided, left-sided, and two-sided alternatives d) Problem 2 (Health Data...
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