5. A student performs three runs of the experiment using the same unknown as yours and...
5. A student performs three runs of the experiment using the same unknown as yours and measuring approximately the same raw data as yours. The student determines NH2 values of 0.1056 mol/g, 0.1055 mol/g, and 0.1057 mol/g.
- What do these results tell you about the random and systematic errors present in his analysis?
- Do you think the errors are due to Calculations or Equipment? Briefly explain.
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5. A student
performs three runs of the experiment using the same unknown as
yours and...
A student attempted to identify an unknown compound by the method used in this experiment. Her or...
A student attempted to identify an unknown compound by the method used in this experiment. Her original sample weight was 0.7047 g. When heated in the first step, the mass decreased to 0.4862 g Write the complete, net balanced reaction that would occur in this experiment if - the student's unknown compound was NaHCO3 -the student's unknown compound was KHCO3 Using stoichiometry, predict the theoretical yield of the solid chloride obtained at the end of the student's experiment if -...
How would the following errors affect the empirical formula of the compound for a hypothetical student...
How would the following errors affect the empirical formula of the compound for a hypothetical student performing s experiment? Note: Writing the answer will be incorrect is not sufficient for these questions. This student is not E) you nor is their data assumed to be the same as yours. student ran out of time and did not do the second heating. Explain thoroughly how this error will affect the water in the hydrate? Will the moles of water calculated be...
2. Carly the chemistry student performs an experiment with vinegar (active ingredient acetic acid, CH,COOH) and...
2. Carly the chemistry student performs an experiment with vinegar (active ingredient acetic acid, CH,COOH) and baking soda (NaHCO3). Her professor asks her to place varying amounts of baking soda and vinegar into sealable plastic bags, quickly seal the bags, and observe the reaction. The balanced chemical equation for the reaction is given here NaHCO3(aq) + CH.COOH(aq) → CO2(g) + H20(1) - NaCH,COO(aq) a) Use limiting reagent calculations to fill in the following table. Please show your work Trial Baking...
4. Suppose that a student performed the experiment and calculations perfectly as directed except that, unknown...
4. Suppose that a student performed the experiment and calculations perfectly as directed except that, unknown to the student, the balance was not zeroed but weighed 0.100 g too high throughout the experiment. Would the calculated val- ue for the density of the unknown liquid be correct? That is, would it be equal to, higher than, or lower than the true value. Explain your answer in clear and correct English. 16 LABORATORY EXPERIMENTS IN GENERAL CHEMISTRY ed in question 4...
Activity 10 How Much Product Will My Reaction Yield? 37 6. Carly the chemistry student performs...
Activity 10 How Much Product Will My Reaction Yield? 37 6. Carly the chemistry student performs an experiment with vinegar (active ingredient acetic acid, CH, COOH) and baking soda (NaHCO). Her professor asks her to place varying amounts of baking soda and vinegar into scalable plastic sandwich bags, quickly seal the bags, and observe the reaction. The balanced chemical equation for the reaction is given here. NaHCO, (aq) + CH,COOH(ag) - CO,(8) + H,O(l) + NaCH COO(ag) a) Use limiting...
PreLab Assignment for Measuring Manganese Using Spectrophotometry List health effects associated with the of exc manganese...
PreLab Assignment for Measuring Manganese Using Spectrophotometry List health effects associated with the of exc manganese abortion per te mount of h isproportional to what we factors worted by a gre a t w Suppose you need to do option to experiment a olion. Approximately what was also would be reworst m ance what would be the best wavelength of light to measure the Why? Explan your answers in one or mor e g end e wrong w Best wavelength...
help with identifiying each unknown in extraction and washing experiment. the ir spectra are given below,...
help with identifiying each unknown in extraction and washing
experiment. the ir spectra are given below, along with data, and
the lab sheet is attached.
Neutral Solid Primary amine (Aniline) 3403cm - NE presence Transmittance 60 3258cm 1 streren NOUD Streich 50 Ctretcher strator NH2 aromatto 11 NO2 aring 2-nitroaniline K LILI 3600 3200 2800 2400 2000 1800 1600 Wavenumber cm-1 1400 1200 1000 800 600 Basic Solid primary amine Transmittance I NH2 Stretch p-acetvianiline 70 60 CS HG NO...
It's a weak acid strong base titration Experiment 4: Identification of an unknown acid by titration...
It's a weak acid strong base titration
Experiment 4: Identification of an unknown acid by titration Page 2 of 15 Background In this experiment, you will use both qualitative and quantitative properties to determine an unknown acid's identity and concentration. To do this analysis, you will perform a titration of your unknown acid sample-specifically a potentiometric titration where you use a pH meter and record pH values during the titration, combined with a visual titration using a color indi- cator...
2. If two different compounds have the same Rr value, how might they be identified using paper chromatography?...
2. If two different compounds have the same Rr value, how might they be identified using paper chromatography? 3. Why is it important to keep the spots on the paper as small as possible? 4. If the solvent pool at the bottom of the beaker touched the spots on the 1.5cm line, what would happen to the spots? How would you address this error? 5. If you were teaching a student how to do paper chromatography, what three pieces of...
1) What chemical is the titrant in this experiment? What chemical is the analyte in this experiment? Experi...
1) What chemical is the titrant in this experiment? What
chemical is the analyte in this
experiment?
Experiment #8: Measuring the Vitamin C Content of Emergen-C™ Objectives: • Students will learn how to use a burette. • Students will learn how to use the iodine starch indicator system to monitor oxidation/reduction reactions. Students will learn how to conduct a titration to determine the amount of analyte in an unknown solution. • Students will learn about ascorbic acid's role as a...
A student attempted to identify an unknown compound by the method used in this experiment. Her original sample weight was 0.7047 g. When heated in the first step, the mass decreased to 0.4862 g Write the complete, net balanced reaction that would occur in this experiment if - the student's unknown compound was NaHCO3 -the student's unknown compound was KHCO3 Using stoichiometry, predict the theoretical yield of the solid chloride obtained at the end of the student's experiment if -...
How would the following errors affect the empirical formula of the compound for a hypothetical student performing s experiment? Note: Writing the answer will be incorrect is not sufficient for these questions. This student is not E) you nor is their data assumed to be the same as yours. student ran out of time and did not do the second heating. Explain thoroughly how this error will affect the water in the hydrate? Will the moles of water calculated be...
2. Carly the chemistry student performs an experiment with vinegar (active ingredient acetic acid, CH,COOH) and baking soda (NaHCO3). Her professor asks her to place varying amounts of baking soda and vinegar into sealable plastic bags, quickly seal the bags, and observe the reaction. The balanced chemical equation for the reaction is given here NaHCO3(aq) + CH.COOH(aq) → CO2(g) + H20(1) - NaCH,COO(aq) a) Use limiting reagent calculations to fill in the following table. Please show your work Trial Baking...
4. Suppose that a student performed the experiment and calculations perfectly as directed except that, unknown to the student, the balance was not zeroed but weighed 0.100 g too high throughout the experiment. Would the calculated val- ue for the density of the unknown liquid be correct? That is, would it be equal to, higher than, or lower than the true value. Explain your answer in clear and correct English. 16 LABORATORY EXPERIMENTS IN GENERAL CHEMISTRY ed in question 4...
Activity 10 How Much Product Will My Reaction Yield? 37 6. Carly the chemistry student performs an experiment with vinegar (active ingredient acetic acid, CH, COOH) and baking soda (NaHCO). Her professor asks her to place varying amounts of baking soda and vinegar into scalable plastic sandwich bags, quickly seal the bags, and observe the reaction. The balanced chemical equation for the reaction is given here. NaHCO, (aq) + CH,COOH(ag) - CO,(8) + H,O(l) + NaCH COO(ag) a) Use limiting...
PreLab Assignment for Measuring Manganese Using Spectrophotometry List health effects associated with the of exc manganese abortion per te mount of h isproportional to what we factors worted by a gre a t w Suppose you need to do option to experiment a olion. Approximately what was also would be reworst m ance what would be the best wavelength of light to measure the Why? Explan your answers in one or mor e g end e wrong w Best wavelength...
help with identifiying each unknown in extraction and washing
experiment. the ir spectra are given below, along with data, and
the lab sheet is attached.
Neutral Solid Primary amine (Aniline) 3403cm - NE presence Transmittance 60 3258cm 1 streren NOUD Streich 50 Ctretcher strator NH2 aromatto 11 NO2 aring 2-nitroaniline K LILI 3600 3200 2800 2400 2000 1800 1600 Wavenumber cm-1 1400 1200 1000 800 600 Basic Solid primary amine Transmittance I NH2 Stretch p-acetvianiline 70 60 CS HG NO...
It's a weak acid strong base titration
Experiment 4: Identification of an unknown acid by titration Page 2 of 15 Background In this experiment, you will use both qualitative and quantitative properties to determine an unknown acid's identity and concentration. To do this analysis, you will perform a titration of your unknown acid sample-specifically a potentiometric titration where you use a pH meter and record pH values during the titration, combined with a visual titration using a color indi- cator...
2. If two different compounds have the same Rr value, how might they be identified using paper chromatography? 3. Why is it important to keep the spots on the paper as small as possible? 4. If the solvent pool at the bottom of the beaker touched the spots on the 1.5cm line, what would happen to the spots? How would you address this error? 5. If you were teaching a student how to do paper chromatography, what three pieces of...
1) What chemical is the titrant in this experiment? What
chemical is the analyte in this
experiment?
Experiment #8: Measuring the Vitamin C Content of Emergen-C™ Objectives: • Students will learn how to use a burette. • Students will learn how to use the iodine starch indicator system to monitor oxidation/reduction reactions. Students will learn how to conduct a titration to determine the amount of analyte in an unknown solution. • Students will learn about ascorbic acid's role as a...
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