In this activity you will use the virtual lab to determine the concentration of a strong monoprotic acid. To do this, you can perform a titration using NaOH and phenolphthalein found in the virtual lab. (Note: The concentration of the acid is between 0.025M and 2.5M so you will need to dilute the NaOH solution so that the volume to reach the endpoint is between 10 and 50 mL).Once you have determined the concentration of the acid, please enter your answer into a form at the bottom of this page.I used: 10 ml of Unknown Acid, 0.15ml of Phenolphthalein and 10 ml of Na OH, how is the answer for the concentration of the acid 1.17 m? 20.150 mL @ 25.0°What is the concentration of the acid (Please use three significant figures for your answer)1.98M.Your answer is not correct.The solution contained 1.17M strong acid. Determine the Concentration of the Unknown Strong AcidIn this activity you will use the virtual lab to determine the concentration of a strong monoprotic acid. To do this, you can perform a titration usinNaOH and phenolphthalein found in the virtual lab. (Note: The concentration of the acid is between 0.025M and 2.5M so you will need to dilute tNaOH solution so that the volume to reach the endpoint is between 10 and 50 mL).Once you have determined the concentration of the acid, please enter your answer into a form at the bottom of this page.VjrtualLabO ENFile -Edit -View -Help -Unknown Acid ProblemStockroomWorkbench 1InformationName: 250 mL FlaskVolume: 20.150 mLUnknown Acid90.000 mL@5.0°CTemperature: 25.00°C25.0 deg10.0 M NAOH48.000 mL @ 25.0°CPhenolphthalein99.850 mL@ 25.0°C50 mL Burette42.000 mL @ 25.0°C

Molar concentration of the monoprotic & unknown acid: Ma = 0.15 M; ( provided, the…

In this activity you will use the virtual lab to determine the concentration of a strong monoprotic acid. To do this, you can perform a titration using NaOH and phenolphthalein found in the virtual lab. (Note: The concentration of the acid is between 0.025M and 2.5M so you will need to dilute the NaOH solution so that the volume to reach the endpoint is between 10 and 50 mL). Once you have determined the concentration of the acid, please enter your answer into a form at the bottom of this page. I used: 10 ml of Unknown Acid, 0.15ml of Phenolphthalein and 10 ml of Na OH, how is the answer for the concentration of the acid 1.17 m?

In this activity you will use the virtual lab to determine the concentration of a strong monoprotic acid. To do this, you can perform a titration using NaOH and phenolphthalein found in the virtual lab. (Note: The concentration of the acid is between 0.025M and 2.5M so you will need to dilute the NaOH solution so that the volume to reach the endpoint is between 10 and 50 mL). Once you have determined the concentration of the acid, please enter your answer into a form at the bottom of this page. I used: 10 ml of Unknown Acid, 0.15ml of Phenolphthalein and 10 ml of Na OH, how is the answer for the concentration of the acid 1.17 m?

Appl Of Ms Excel In Analytical Chemistry

2nd Edition

ISBN:9781285686691

Author:Crouch

Publisher:Crouch

Chapter6: The Systematic Approach To Equilibria: Solving Many Equations

Section: Chapter Questions

Problem 13P

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Similar questions

Determine the Concentration of the Unknown Strong Acid. In this activity you will use the virtual lab to determine the concentration of a strong monoprotic acid. To do this, you can perform a titration using NaOH and phenolphthalein found in the virtual lab. (Note: The concentration of the acid is between 0.025M and 2.5M so you will need to dilute the NaOH solution so that the volume to reach the endpoint is between 10 and 50 mL). 10 mL of unknown acid sample was placed in a 250 mL Flask. 3 drops (0.15 mL) of Phenolphthalein was added to the unknown acid and 10.0 M NaOH solution titrant was dispensed until it changed color. The final volume of the unknown acid sample is 11.680 mL. According to the website, the concentration of the acid is 1.53 M. Please provide the computation for the final concentration of the unknown sample.
In this activity, you will use the virtual lab to determine the concentration of a strong monoprotic acid. To do this, you can perform a titration using NaOH and phenolphthalein found in the virtual lab. (Note: The concentration of the acid is between 0.025M and 2.5M so you will need to dilute the NaOH solution so that the volume to reach the endpoint is between 10 and 50 mL). 1. Volume (mL) of the unknown acid solution with the indicator in the flask: ________ (Write your answer in 2 decimal places without the unit). 2. Volume (mL) of the base used to complete the titration:____________ (Write your answer in 2 decimal places without the unit). 3. Concentration (Molarity) of the unknown acid:_________ (Write your answer in 2 decimal places without the unit).
In this activity you will use the virtual lab to determine the concentration of a strong monoprotic acid. To do this, you can perform a titration using NaOH and phenolphthalein found in the virtual lab. (Note: The concentration of the acid is between 0.025M and 2.5M so you will need to dilute the NaOH solution so that the volume to reach the endpoint is between 10 and 50 mL). Once you have determined the concentration of the acid, please enter your answer into a form at the bottom of this page. Unknown acid: 10 ml 0.15 ml of phenolphthalein 0.60 ml of NaOH
To perform a certain activity assay it is necessary to have 0.25 mL of an enzyme at a concentration of 0.2 mgmL-1 in the presence of 0.4 mM substrate and 200 mM NaCl in a suitable buffer. The stock solutions of enzyme, substrate and NaCl are 4 mgmL-1, 40 mM and 1 M, all in the same type of buffer. What volumes of the stock solutions and buffer are required for each assay?
Complete the following: 1. Random error, also called _________arises from the effects of uncontrolled variables in the measurement. 2. The ____________,measures how closely the data are clustered about mean. 3. The chemical equilibrium in which all the reactants and products are in the same phase are called____________. 4. Reaction that go to completion and never proceed in the reverse direction are said to be_____________ 5. The equation for buffer is the__________equation. 6. A ___________solution is one that resists changes in pH when small quantities of an acid or an alkali added to it. 7. __________is the pH of the pure, neutral and polyprotic
You are given the suggestion that a 0.15 ppm quinine aqueous solution is a good concentration to shoot for in the experiments, but quinine fluoresces best when it is acidified to 0.10 M H2SO4. Describe how to make 100 mL of the recommended solution starting with quinine sulfate (actually, quinine hemisulfate salt monohydrate). Assume you also have 1.0 M sulfuric acid and de-ionized water.
6 I- + BrO3- + 6 H+ ----- 3 I2 + Br- + 3 H2O Rate= k[I-]m[BrO3-]n[H+]p rate= (∆[I2])/(3*∆time) [I-] 0.010M [S2O3-2] 0.0010M H2O [BrO3-] 0.04M HCl 0.10M Starch Indicator (sec.) Volume, ml Volume, ml Volume, ml Volume, ml Volume, ml 1 10 10 20 10 10 1-3 drops 301.90 2 20 10 10 10 10 1-3 drops 213.28 3 10 10 10 20 10 1-3 drops 214.92 4 10 10 10 10 20 1-3 drops 86.45 Temperature of Reaction: _______20 C________ 1. Using the dilution equation (M1V1 = M2V2) calculate the concentration of the I-, BrO3- and the H+ (HCl) in the final mixture just prior to any reaction. 2. Calculate the rate for each experiment as explained in the background information. 3. Using the information above determine the rate law (m, n and p) for the reaction. Show all calculations/reasoning in your notebook. m_____________ n_________________ p…
Tom, an analytical chemist, bought a bag of decaffeinated coffee from a grocery store. However,Tom suspected that he might have received regular coffee and therefore decided to analyze hiscoffee for caffeine. In the lab, he took 0.5 mL of the brewed coffee and diluted it in water tomake a 100.0 mL solution. He performed four analyses and found the concentrations to be 4.69,3.99, 4.12, and 4.50 mg/L, respectively. (Assume the density of all solutions is 1.000 g/mL,1oz= 28.35 mL).(a) Report the concentration (in mg/L) of caffeine in the brewed coffee using the format asaverage ± standard deviation. (Note this is not the concentration in the diluted solution.)(b) Look up the caffeine content of regular vs. decaffeinated coffee. Do you think that Tom wasgiven the wrong type of coffee?(c) Caffeine intake of 300 mg per day reportedly has no adverse effects in the vast majority ofthe adult population. If Tom drinks 3 cups (8 oz/cup) of this coffee daily, is his intake withinthis known safe…
The water hardness of tap water has been determined to be 120 (= 120 mg CaCO3 per 1 L of water). After the tap water has run through the ion exchange column, titration of a 20.00 mL sample used only 0.70 mL of 0.0100 M EDTA, to reach the endpoint. Calculate the effectiveness of the ion exchange column: what is the % of the calcium, removed by the ion exchange column? Provide your answer in % and without decimal. ( Please type answer note write by hend)
Draw a diagram (picture) showing the principle species in solution as a function of pH for a mixture of 0.0200 M formic acid and 0.0100 M ascorbic acid. The Y axis should be concentration. The X axis should be pH and you will need to look up the pKa values
Tc-99m sulfur colloid is to be reconstituted with 75 mCi Tc-99m pertechnetate, to be drawn from an eluate with activity concentration of 325 mCi/mL. You will add constituents totaling 2.5 mL to the kit. What volume of eluate and of normal saline should be added to reach 5 mL final volume?
Based on the table below: 1). create a titration curve of pH vs. volume NaOH (graph in in Excel). Indicate on graph the location of each pKa (pka1, pKa2, pKaR) , first and second equivalence point and pI. Show all your calculations. 2). 1st derivative plot of ΔpH / Δvol NaOH an the y-axis and average vol NaOH on the x-axis (graph in Excel). Highlight (label) the equivalence points Table 1.2 - Titration of an unknown amino acid with NaOH Vol. NaOH (mL) pH Avg.Vol. NaOH (mL) pH / Vol NaOH 0.00 2.12 0.5 0.02 1.00 2.14 1.5 -0.02 2.00 2.12 2.5 0.13 3.00 2.25 3.5 0.07 4.00 2.32 4.5 0.06 5.00 2.38 5.5 0.06 6.00 2.44 6.5 0.07 7.00 2.51 7.5 0.1 8.00 2.61 8.5 0.11 9.00 2.72 9.5 0.08 10.00 2.80 10.5 0.29 11.00 3.09 11.5 0.44 12.00 3.53 12.5 1.17 13.00 4.70 13.5 0.51 14.00 5.21 14.5 0.29 15.00 5.50 15.5 0.18 16.00 5.68…