what is molarity, the average molarity, and standard deviation? igmsa H Titrations - Report Sheet Name Part A - - Standardization of NaOH Trial 1 Trial 2 Trial 3 500 .05AL 24.8AL 24.4ac 24.3 mL 24.6aL 2635のL df.3nc .50 500 Mass of KHP Initial Volume of NaOH Final Volume of NaOH Volume of NAOH Dispensed Molarity of NAOH Average Molarity of NaOH Standard Deviation Calculations
Q: An electrode is called an active electrode when? Select the correct answer below: it does…
A:
Q: Which solution has the greatest buffer capacity? Which solution can react with the largest amount…
A: Buffer solution: The solution that resists the change in pH is known as a buffer solution. The…
Q: 1. CH2=CHLI 2. НзО*
A:
Q: 9. AGNO, + KI 10. AgNO, - KIO, 11. AGNO, Na, SO, [+]
A: Write molecular equation with its phase and write product for each side. In multipart questions we…
Q: A photon has an energy of 2.35 x 10–19 kJ. Find the wave length of the radiation in µm.
A: Energy of photon = 2.35 × 10-19 KJ Wavelength of radiation (in μm) = ?
Q: CH, H20 H2SO4 H,C- -CH3 H,C
A:
Q: Given the following data is collecte din a laboratory experiment. Calculated the empirical formula…
A: Given that, Amount of copper wire = 1.596 g Moles of copper in copper wire = 1.596 g/63.546 g/mol =…
Q: mole fraction of argon?
A:
Q: Benzoic acid (C,H$COOH) ionized to form the benzoate ion (C&H$COO'). Benzoic acid has a K=6.3 x 10%.…
A:
Q: A 0.56g sample of gas is contained in 250.0 mL cylinder. It's pressure is 983 mmHg and it's…
A:
Q: 1 gram of radium (226Ra) is separated from its decay products and then placed in an insulated…
A: Given: Initial amount of 226Ra = 1 g Time of decay = 60 days = 0.1644 years Hal-life of 226Ra = 1600…
Q: In what condition, a reaction is product-favored. Select the correct answer... a. K° = 0 and…
A: Let consider a general reaction, A + B <====> P + Q A and B are reactant. P and Q are product.…
Q: The concentration of Sr2* in a saturated solution of SrCrO4 is 6.29x10-3 mol/L at a certain…
A:
Q: Set up a cell that has a Mg electrode in a 1.0 M aqueous Mg?+ solution on the left side and a Cu…
A: Left side of cell reaction represents oxidation Half cell i.e - - > oxidation of Mg Mg is…
Q: It is desired to prepare 200 mL of a buffer solution of Ph 4.5 from acetic acid, CH3COOH and its…
A:
Q: Acetylene is a gas used for welding metal. a. Write the balanced combustion reaction for acetylene,…
A:
Q: attention to significant figures. What is the pH of a 0.48 M solution of weak acid? The Ka of the…
A:
Q: X Thcorret Draw the major organic product of the following reaction. Do not draw any byproducts. 1.…
A:
Q: The equation for electrolysis of molten NaCl is: 2NaCl(l) 2Na(l) + Cl2(g). What half reaction…
A:
Q: The mass of solute per 100 ml of solution is abbreviated as (m/v). Mass is not technically the same…
A:
Q: The activation energy for the gas phase isomerization of dimethyl maleate is 111 kJ.…
A: Activation energy =111 KJ =111000 J T1=678K K1=3.77×10-4 K2=3.08×10-3 T2=?
Q: OH
A:
Q: decrease S, or leave S unchanged. If you don't have enough information to decide, check the "not…
A: Entropy is degree of randomness or disorderness. By increasing Temperature, moles, volume Entropy…
Q: if the extracellular fluid outside the cell has a higher molarity that the cells cytoplasm inside…
A: In the question it is not instructed to what to do.I am rectifying the false statement of the…
Q: Draw the product in the following enzyme catalysed reaction
A:
Q: Chemistry Calculate [Cu2+]eq using Nernst Equation E cell: 0.48 Temperature: 25.0 C n=2
A: EoCu²+/Cu : 0.337 V Given, Ecell : 0.48 V Temperature : 25 oC = 298K n = 2
Q: A voltaic cell employs the following redox reaction: 2 Fe+ (aq) + 3 Mg (s) → 2 Fe (s)+3 Mg²+ (aq)…
A: Given- [Fe+3]=3.10M [Mg2+]=1.2×10-3M Ecell=? ->Answer may differ slightly because values of…
Q: The concentration of Ag* in a saturated solution of Ag2CO3 is 2.46x10-* mol/L at a certain…
A: Concentration of Ag+ in saturated solution of Ag2CO3 is 2.4 × 10-4 mol/L
Q: Draw the major organic product of the indicated reaction conditions. Be sure to clearly depict the…
A: In given reactant We have, amide function and alkyne function. And given reagent is lindlar…
Q: How many electrons are gaining or losing in this half-reaction? (write complete half reaction in a…
A:
Q: What is the phenomenon that occurs when excited gaseous elements emit only a few colored lines? O…
A:
Q: Nitration reaction takes away electrons from the ring deactivating the ring and lessening the…
A: Nitration is a process in which there is the replacement of a hydrogen atom (organic compound) with…
Q: 1) NBS 2) DMSO. H,0 он 1) NaH CH,CH, 2) CH,CH,
A: All these given reactions involves alkenes, alcohol and ether as starting materials. The…
Q: Pyridine and pyrrole, which is more basic and why? H. pyridine pyrrole A- Pyrrole, protonation would…
A:
Q: Electrochemical cell uses salt bride to complete the circuit. What is true from the following…
A:
Q: Be sure to answer all parts. Determine the percent ionization of the following solutions of phenol…
A:
Q: Match the following electron configuration for the correct element or ion. A. Cr 1s2 252p6…
A:
Q: ) Tsct, Pyridime ) NaS CH2 CH 3 2) H20 5) oCH 3 B82 ocH3 PBY
A: Hu
Q: 0.0524 moles of h2o equals how many molecules of water?
A: Number of moles of H2O (water) = 0.0524 moles Number of molecules of water = ?
Q: has increased solubility in acidic solution. Why?
A: Solubility equilibrium of BaF2 BaF2(s) <----> Ba2+ + 2F- If we dissolved in acidic medium ( in…
Q: 2) For the following compounds, a) identify chiral carbons by putting a* near each one. b) describe…
A: In a given question , we have to find out many things like Chiral carbon--- any carbon attached…
Q: will be product-favored or reactant favored when temperature changes occur. If reaction favored to…
A: As we know, Spontaneity of a chemical reaction is determined by Gibbs free energy change. As □G is…
Q: the concentration in mol/L of th
A:
Q: 10. Which of the equation below refers to the enthalpy of combustion? vos 16 29isivioE HOTlih sh A.…
A:
Q: a) FC of nitrogen in NO3: b) FC of carbon in CO2 =
A: Given :- molecular/ion formula NO3- CO2 To determine :- FC of N in NO3- FC of C in CO2
Q: H,N-NH,
A:
Q: 5. Draw a structural example of a primary, secondary and tertiary alcohol.
A:
Q: When a system is a dynamic equilibrium, A no reactions are occurring B a reaction is occurring in…
A:
Q: The pH of blood is buffered by a mixture of HCO3- (bicarbonate) and H2CO3 (carbonic acid). i. Write…
A: The pH of blood is buffered by a mixture of HCO3- (bicarbonate) and H2CO3 (carbonic acid).i. Write…
Q: Which element has the largest atomic radius? explain your answer in a separate sheet. O H O F O Na
A: Given :- symbol of elements H, F, Na and O To identify :- element with largest atomic radius
Step by step
Solved in 4 steps with 4 images
- Concentration sodium thiosulfate solution used: 0.056 mol L-1 ACCURATE TITRATION VOLUME OF SODIUM THIOSULFATE SOLUTION USED Volume titration 1, (ml) Volume titration 2, (ml) Your Group 15.80 15.75 Group 1 16.05 15.70 Group 2 16.30 16.25 ANALYSIS Average volume used, (mL) Standard deviation Number of moles sodium thiosulfate used, (mol) Number of moles calcium iodate in solution, (mol) Volume of calcium iodate used, (mL) Concentration of saturated calcium iodate solution (mol L-¹) Unrounded value 15.9750 0.26220 Rounded value 15.97 0.262 10.0Concentration sodium thiosulfate solution used: 0.056 mol L-1 ACCURATE TITRATION VOLUME OF SODIUM THIOSULFATE SOLUTION USED Volume titration 1, (mL) Volume titration 2, (mL) Your Group 15.80 15.75 Group 1 16.05 15.70 Group 2 16.30 16.25 ANALYSIS Average volume used, (ml) Standard deviation Number of moles sodium thiosulfate used, (mol) Number of moles calcium iodate in solution, (mol) Volume of calcium iodate used, (mL) Concentration of saturated calcium iodate solution (mol L-¹) Unrounded value 15.9750 0.26220 0.00089400 0.00036700 A Rounded value 15.97 0.262 8.94 x 10-4 10.0 MinimizeSCE students measured the concentration of HCl in a solution by titrating with different indicators to find the end point.Indicator Mean HCl concentration (M)(± standard deviation)Number of measurementsBromothymol blue 0.09565 ± 0.00225 28Methyl red 0.08686 ± 0.00098 18Bromocresol green 0.08641 ± 0.00113 29Is the difference between indicators 1 and 2 significant at the 95% confidence level? Answer the same question for indicators 2 and 3
- Students measured the concentration of HCl in a solution by titrating with different indicators to find the end point. (Use the table to find critical F values.) Mean HCl concentration (M) (+ standard deviation) Indicator Number of measurements 1. Bromothymol blue 0.09565 + 0.00170 28 2. Methyl red 0.08681 ± 0.00098 18 3. Bromocresol green 0.08641 + 0.00106 29 Is the difference between Indicators 1 and 2 significant at the 95% confidence level? O Yes O No Fenlculated clegrees of freedom Ecalculated Is the difference between indicators 2 and 3 significant at the 95% confidence level? O Yes O No Fealculated Spooled tcalculatedYou collected the following data from a titration experiment using a 0.123M standardized NaOH solution to titrate a 27.36 mL solution with an unknown Molarity concentration (M) of sulfuric acid (H2SO4). Initial Final Vol Delivered |(mL) Burette Burette Reading (mL) Reading (mL) Trial 1 0.56 19.20 ?? Trial 2 0.57 19.7 Trial 3 0.92 19.56 For just Trial 1, determine the amount of NaOH delivered for the titration with appropriate significant digits. Do not include units. Answer:In this double titration experiment determining composition of soda ash, you are given the following data: M HCl titrant: 0.0501 M +/- 0.0507 Mass of soda ash sample, g: 0.2505 ± 2.0e-4 (Analytical Balance) Total volume of Sample Stock, mL: 75 ± 0.05 (100mL graduated cylinder) Volume of Sample Stock Aliquot, mL: 25 ± 0.3 Find the missing information. Show solutions
- M 23 (H) Inorganic Analytical Chemistry pard My courses CHEM 23 (H) FS-AY:20-21 Week 4-5: Quantitative Analysis by Gravimetry and Titration Quiz 4 Qu 10 The 500.0-mg sample of impure Na2 CO3 (FM: 105.96) required 22.00 mL of the HCI standard solution (the obtained concentration of HCI from the previous question, problem 5: Titrimetry short answer type) for complete neutralization. ut of 1. Give the balanced chemical equation between the sample, Na2CO3 and the standard, HCI. 2. What is the mass (g) of Na, CO3 in the sample? 3. Calculate the % (w/w) purity of a 500.0-mg sample of impure Na2 CO3 Note: Type your solution here or upload its pic in Jpeg or pdf format. Another option is to send it to me via email (subject: Fam name-Quiz 4) or messenger, privately. Do not forget to box the final answer and write your name. В I 1.Table A: Standard NaCl used to make primary standard solution Mass of weighing bottle + NaC1 (g) 21.8720 Mass of weighing bottle after transfer (g) 21.772 Mass of NaCl used in solution (g) 0.6948 Purity of NaCl (%) 100.03 Table A: unknow used to make primary standard solution Mass of weighing bottle + unknow (g) 16.8777 Mass of weighing bottle after transfer (g) 16.20010 Mass of unknow used in solution (g) 0.6776 Purity of unknow (%) Table C: Titration of 25.00 mL aliquots of NaCl with AGNO3 Trial 1 Trial 2 Trial 3 Final Burette Reading (mL) 28.29 24.79 25.11 Initial Burette Reading (mL) 4.99 1.49 1.69 Volume Added (mL) 23.30 23.30 23.42 Table C: Titration of 25.00 mL aliquots of unknow with AGNO3 Trial 1 Trial 2 Trial 3 Final Burette Reading (mL) Initial Burette Reading (mL) 23.99 22.45 26.91 2.89 1.25 5.61 Volume Added (mL) 21.10 21.20 21.30DATA AND RESULTS: Titration Data (Standardization of EDTA) Example II Mass, g Caco, 0.0250 0.0251 0.0246 0.0254 Final reading, mL 25.00 24.91 24.87 25.31 Initial Reading, mL 0.00 0.02 0.02 0.02 Volume, mL EDTA 25.00 Molarity of EDTA, M 0.009992 B. Analysis Data Example II Volume of Sample, mL 25.00 24.90 25.10 25.0 Final reading, mL 27.46 25.08 25.06 24.99 Initial Reading, mL 0.00 0.02 0.02 0.02 Volume of EDTA, mL 27.46 Molarity of EDTA, M 0.009992 Ca" concentration, ppm 440 STATISTICAL EVALUATION OF RESULTS Standardization of EDTA Mean, M EDTA Median, M EDTA Standard Deviation Ci for u at 95% Prob. Level Reported value: M EDTA Ca" Concentration Mean, Ca" ppm Median, Ca" ppm Standard deviation Cl for u at 95% Prob. Level Reported value: Ca" ppm
- One of the following statements is incorrect Select one: O Back-titration is required when the rate of the reaction slow. O A standard solution should react completely with the analyte without a definite chemical equation. Standardization is required when the titrant solution molarity is approximate. O A primary standard should be highly pure, has atmospheric stability and absence of hydrated water. O Titration error is the difference between equivalence point volume and end point volume.Based on the following molarities obtained,1.00 x10^-1 , 1.04 x10^-1 and 1.0 2x10^-1. fine the average molarity and standard deviation.Trial 1 Trial 2 Trial 3 Initial burette reading (mL) 2.29 1.41 1.95 Molarity of NaOH (M) 0.100 0.100 0.100 Volume of vinegar sample (mL) 5.00 5.00 5.00 Final burette reading (mL) 50.37 49.39 49.84 Table 2. Titration data Trial 1 Trial 2 Trial 3 Initial burette reading (mL) 2.29 1.41 1.95 Molarity of NaOH (M) 0.100 0.100 0.100 Volume of vinegar sample (mL) 5.00 5.00 5.00 Final burette reading (mL) 50.37 49.39 49.84 Expected color at end point Volume of NaOH used (mL) 48.08 47.98 47.89 Compute for the ff: a. Average moles of acetic acid (mol)? b. Average molarity of acetic acid (M)? c. Average molarity of acetic acid (M)?