Prelaboratory Assignment: Qualitative Analysis Group III Cations 1. Prepare a complete flow chart for the procedure and put it on your data sheet.
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A: Kc = [IBr]2/[I2] [Br]
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Q: HO COH
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A: Percent composition = (total mass of element in compound/mass of 1 mol of compound) x 100%
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A: Molar mass of compound is the sum of mass of each element in the compound.
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A: given, moles of LiNO3 = 0.46 mol Volume = 6.24 L
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Q: if the H3O+ ion concentration in an aqueous solution at 25 °c has a value of 6.82 x 10^-8 M, what is...
A: H3O+ = 6.82 x 10^-8
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A: E1 _elimination unimolecular Reaction E2 - elimination bimolecular Reaction
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A: Given:
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- Need help filling this out. It is the Data Sheet for Ch. 2 Qualitative Analysis. Very much appreciated!Instructions: Refer to the photo below. Answer the ff: c. At equivalence point d. Past the equivalence pointI would need help writing a plan and understanding the experiment: An unknown solid sample is given to you. It is a mixture of KHP & NaCl. Your goal is to find % of KHP in this given unknown sample. Given: Standardized NaOH (made last week) Unknown KHP Sample Computer with pH probe- Logger Pro-Vernier program Digital Burette pH meter
- Draw flow chart for the extraction of mixture containing a. Acid and Base Acid and Neutral Base and NeutralWhen taking a measurement with a pH meter, keep the instrument in the Choose...storage solution or water until it is needed. Rinse the pH meter with Choose...deionized water or acetone and gently pat dry. Place the meter in the sample solution, and record the measurement when the pH Choose...stabilizes or reaches the maximum value .Sources of Error Determine the relationship between the observed/apparent value (EX) VERSUS that of the true value (ET) for the quantity being sought by writing either <, >, or = on the space provided TOPIC: Determination of Molar Concentration of each component (Double Indicator Titration)1. No blank correction Ex _______ET2. Bubbles trapped in the tip of burette: EX ______ ET3. Measuring the sample volume using a volumetric pipet while looking downwards at the meniscus: EX _____ ET
- Describe the challenges involved in qualitative analysis. Despite the challenges, do you think this is a useful technique?Please show the schematic diagram (qualitative analysis) of NaCl1.Determine the color of the indicator in a given condition: METHYL ORANGE IN AN ACIDIC ENVIRONMENT. 2.This is the measure of reproducibility of data within a series of results. 3.This is the chemical to be subjected to testing in titrimetric method of analysis. 4.Determine the type of assay employed for this substance: TARTARIC ACID 5.Determine the color of the indicator in a given condition: PHENOLPHTHALEIN IN AN ALKALINE ENVIRONMENT. Please help me answer this questions. the answers are on the image I attached
- Using a pH meter, verify that 100 mL of distilled water is neutral.Dissolve 50.0 mg of naproxen drug substance, accurately weighed, in 50 mL of methanol. Add 25 mL of the neutralized water and mix. Add two drops ofphenolphthalein as the indicator. What is the blank sample in this experiment? How many sample and blank titrations are required for this experiment? Use the equation below to calculate your expected end-point volume. Each mL of 0.01 N sodium hydroxide is equivalent to 2.303 mg of naproxen,C14H14O3ou let your partner do a trial since you're nice. He/she adds a few mL of NaOH, but you realize that nobody recorded the initial buret level! RATS! What do you do? a) Just get light pink since that's the point of titrations anyways. b) Finish the titration and record the final buret reading. Ask your instructor what the initial buret reading was since he knows all of them by heart...right? c) Just record the current level as the "initial" reading. Precision isn't THAT important. d) Restart the trial since you have no idea how much NaOH was added so far.why is it necessary to test the ph? EXTRME DETAIL PLEASE PROCEDURE To a six inch test tube was added thiamine hydrochloride (0.65 g), followed by water (2mL). The mixture was gently shaken until homogeneous, and then ethanol (7.5 mL)was added. Finally, sodium hydroxide (10%, 1.5 mL) was added and the mixture wasgently stirred to ensure complete mixing.Benzaldehyde (3.8 mL) was then added at room temperature in one portion with gentlestirring. The pH of the resulting reaction mixture was determined and adjusted to >10by dropwise addition of 10% sodium hydroxide.