In all quanitative volumetric experiments it is necessary to use the same pipet for all dilutions...
Homework Answers
Quantitative means the determination of quantity and there should be minimum error in the process for accurate quantitative determination.
Every glassware have its own error associated with it , so if we use different pipets , then different volumetric errors may occur , that is why all experiment is done with same pipet .
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In
all quanitative volumetric experiments it is necessary to use the
same pipet for all dilutions...
Use a volumetric pipet to deliver 2 mL of 4 M sodium hydroxide solution to each...
Use a volumetric pipet to deliver 2 mL of 4 M sodium hydroxide solution to each of seven 100-mL volumetric flasks. Add 2,4, 6, 8, and 10 mL, respectively, of the salicylic acid stock solution to 5 of the labeled flasks. Calculate the concentrations of the standard solutions. Use a pipet to place 10 mL of the unknown solution into another volumetric flask and label Unknown 1. Dilute each solution to the mark with DI water. The seventh flask that...
student took a sample of vinegar with a 5 ml volumetric pipet and then emptied all...
student took a sample of vinegar with a 5 ml volumetric pipet and then emptied all of the liquid in an Erlenmeyer flask by blowing out the sample
what is the reaction stoichiometry according to your data? is it reasonable? Question 2: Write down...
what is the reaction stoichiometry according to your data? is it
reasonable?
Question 2: Write down the overall reaction equation, and the net ionic equation for the reaction you observed in the single well titration of HCI with NaOH. Be sure to include states: (ga), (g), (09) (s). (6 points) Overall: HCl(aq) + NaOH (ag) → Nachlag) + H20 (1) Net lonic: H+ (as) + OH-(ag) → H20 (1) Na+ and CL-are spectator ions Questions: 01. In this section you...
Match the piece of solution lab equipment with its use below. a. graduated cylinder e. buret...
Match the piece of solution lab equipment with its use below. a. graduated cylinder e. buret b. wash bottle f. balance c. Erlenmeyer flask g. volumetric flask d. pipet h. cap 1. device used to measure masses of solid compounds f = balance - _ 2. contains distilled water used to top up the last tiny volume of a solution - SE 3. device used to measure volumes with fairly accurate results ds Pipet 4. container that has an accurate...
3. Repeated-measures and matched-subjects experiments Aa Aa Repeated-measures experiments measure the same set of research participants...
3. Repeated-measures and matched-subjects experiments Aa Aa Repeated-measures experiments measure the same set of research participants two or more times, while matched-subjects experiments study participants who are matched on one or more characteristics. Which of the following are true for both a repeated-measures experiment and a matched-subjects experiment when used to compare two treatment conditions? Check all that apply. The researcher computes difference scores to compute a t statistic. â–¡ If the researcher has n number of participants to use...
Analysis of Co?by Spectrophotometry 3. Utilizing the data below to calculate the absorbances of your dilutions...
Analysis of Co?by Spectrophotometry 3. Utilizing the data below to calculate the absorbances of your dilutions from part 2 % Transmittance This exam involves using best practices to analyze a Counknown solution. Multiple working standard solutions will be prepared bydiluting a stock solution of Cocle The 0.200M stock solution will be the highest concentration standard it has been analyzed to give the table (below) of absorbances as a function of wavelength. This analysis will be done by spectrophotometry. Measurements are...
3. Utilizing the data below to calculate the absorbances of your dilutions from part 2. Known...
3. Utilizing the data below to calculate the absorbances of your dilutions from part 2. Known Concentration % Transmittance 0.20 0 0.18 13 0.16 0.14 16 20.1 26 0.12 4. Type your concentrations into the data table below. Generate a graph of your dilution data from part 2 above. Absorbance Solution Concentration OM (blank) 4 When finished, start calculating the data below, based on your dilution data from part 2. Perform the best linear regression using Graphing calculator or Excel...
II(10 pts) State Using simple gas laws, complete the following table. All experiments were performed on the same sam...
II(10 pts) State Using simple gas laws, complete the following table. All experiments were performed on the same sample of gas. T(K) P(atm) VL) 265 0.425 297 6.8 0.680 5.0 335 0.425 6.8 Some commercial drain cleaners make use of the following reaction to declar drains
Post-Lab Questions 27. Why was it necessary to wait until almost all of the l2 formed had reacted...
Post-Lab Questions 27. Why was it necessary to wait until almost all of the l2 formed had reacted with the thiosulfate being added before adding in the starch indicator? 28. If KIO, is a primary standard, why didn't you just weigh out solid KI Os for each trial in the same he primary standard potassium hydrogen phthalate for an acid-base way you would do for t titration?
Post-Lab Questions 27. Why was it necessary to wait until almost all of...
Please respond to all questions related to Fixed Assets. 1. Is it necessary for a business to use the same method of com...
Please respond to all questions related to Fixed Assets. 1. Is it necessary for a business to use the same method of computing depreciation: (a) for all classes of its depreciable assets, (b) for financial statement purposes and in determining income taxes? 2. For some of the fixed assets of a business, the balance in Accumulated Depreciation is exactly equal to the cost of the asset. (a) Is it permissible to record additional depreciation on the assets if they are...
Use a volumetric pipet to deliver 2 mL of 4 M sodium hydroxide solution to each of seven 100-mL volumetric flasks. Add 2,4, 6, 8, and 10 mL, respectively, of the salicylic acid stock solution to 5 of the labeled flasks. Calculate the concentrations of the standard solutions. Use a pipet to place 10 mL of the unknown solution into another volumetric flask and label Unknown 1. Dilute each solution to the mark with DI water. The seventh flask that...
what is the reaction stoichiometry according to your data? is it
reasonable?
Question 2: Write down the overall reaction equation, and the net ionic equation for the reaction you observed in the single well titration of HCI with NaOH. Be sure to include states: (ga), (g), (09) (s). (6 points) Overall: HCl(aq) + NaOH (ag) → Nachlag) + H20 (1) Net lonic: H+ (as) + OH-(ag) → H20 (1) Na+ and CL-are spectator ions Questions: 01. In this section you...
Match the piece of solution lab equipment with its use below. a. graduated cylinder e. buret b. wash bottle f. balance c. Erlenmeyer flask g. volumetric flask d. pipet h. cap 1. device used to measure masses of solid compounds f = balance - _ 2. contains distilled water used to top up the last tiny volume of a solution - SE 3. device used to measure volumes with fairly accurate results ds Pipet 4. container that has an accurate...
3. Repeated-measures and matched-subjects experiments Aa Aa Repeated-measures experiments measure the same set of research participants two or more times, while matched-subjects experiments study participants who are matched on one or more characteristics. Which of the following are true for both a repeated-measures experiment and a matched-subjects experiment when used to compare two treatment conditions? Check all that apply. The researcher computes difference scores to compute a t statistic. â–¡ If the researcher has n number of participants to use...
Analysis of Co?by Spectrophotometry 3. Utilizing the data below to calculate the absorbances of your dilutions from part 2 % Transmittance This exam involves using best practices to analyze a Counknown solution. Multiple working standard solutions will be prepared bydiluting a stock solution of Cocle The 0.200M stock solution will be the highest concentration standard it has been analyzed to give the table (below) of absorbances as a function of wavelength. This analysis will be done by spectrophotometry. Measurements are...
3. Utilizing the data below to calculate the absorbances of your dilutions from part 2. Known Concentration % Transmittance 0.20 0 0.18 13 0.16 0.14 16 20.1 26 0.12 4. Type your concentrations into the data table below. Generate a graph of your dilution data from part 2 above. Absorbance Solution Concentration OM (blank) 4 When finished, start calculating the data below, based on your dilution data from part 2. Perform the best linear regression using Graphing calculator or Excel...
II(10 pts) State Using simple gas laws, complete the following table. All experiments were performed on the same sample of gas. T(K) P(atm) VL) 265 0.425 297 6.8 0.680 5.0 335 0.425 6.8 Some commercial drain cleaners make use of the following reaction to declar drains
Post-Lab Questions 27. Why was it necessary to wait until almost all of the l2 formed had reacted with the thiosulfate being added before adding in the starch indicator? 28. If KIO, is a primary standard, why didn't you just weigh out solid KI Os for each trial in the same he primary standard potassium hydrogen phthalate for an acid-base way you would do for t titration?
Post-Lab Questions 27. Why was it necessary to wait until almost all of...
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