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Q: Which chemical was the base in the buffer containing NaH2PO4 and Na2HPO4?
A: Acids are substances which have protons which can be donated to other chemical species. Acidic…
Q: Which of the following represents a Buffer solution?
A: Buffer solution can be defined as the solution which resists changes in pH when acid or alkali is…
Q: Why is there a need to filter the alkaline solution after adding the Barium chloride solution?
A: In an aqueous solution, barium chloride acts as a simple salt. However when dissolved in water, it…
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A: The concentration of unknown solution can be calculated from the formula C1V1= C2V2 Where C1=…
Q: What are the two components of a buffer system? How does a buffer work to hold pH nearly constant?
A: Buffer is an aqueous solution consisting of a weak acid or a base and its conjugate base or an acid.…
Q: What is the pH of a 0.40 M ammonia solution?
A: Ammonia, NH3, is a colorless gas having a distinct odor. It has of nitrogen and hydrogen atoms, made…
Q: Ammonia-containing window cleaners are considered pH-neutral substances true or false?
A: As chemicals are dissolved in water, the pH level of the mixture is either acidic or basic. pH level…
Q: Why did the blank used in experimental procedures contain substrate, buffer and water?
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Q: What must be added to pure water to decrease the OH- concentration? To decrease the H+…
A: When the concentration H+ and OH- ions are equal, the concentration of each is 10-7 M or molar, and…
Q: Why potato strip increase in size when placed in distilled water?
A: Osmosis is defined as the movement of water molecules from the higher water potential region to the…
Q: What is the pH of the buffer 0.17 M Na2HPO4/0.25 M KH2PO4?
A: Buffer is the mixture of strong acid and salt of that acid (base). If we add either strong acids or…
Q: What is a pH buffer and why are they important?
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Q: Why does the pH change by one unit if the hydrogen ion concentration changes by a factor of 10?
A: The potential of hydrogen (pH) is a scale that depicts the acidity or basicity of a solution.…
Q: our patient drank the following liquids for breakfast;220 ml of orange juice,180 ml of milk and 150…
A: Nutrition is a process in which an organism uses food to support its life as food provides energy…
Q: Why does buffers is significant inside a human body?
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Q: Which is the stronger acid, ethanol or phenol?
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Q: Calculate pH of buffer prepared by mixing; 10ml of 0.10M of CH3COOH and 20ml of 0.10M of CH3COONa.
A: A buffer is defined as the mixture of a weak acid and its conjugate base or weak base and its…
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Q: а. 1.3 b. 2.3 C. 3.3 d. 4.3 termine the pH of a 0.50 M NAH2PO4 and 0.10 M Na2HPO4 solution pka is…
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Q: What is the functional difference between TAE and TBE buffer?
A: A buffer is a solution capable of withstanding pH changes even when a base or acid solution is…
Q: What happened when potato strip placed in salt water?
A: 1) A solution mixture that exhibits a higher concentration of salt than the surrounding medium. Then…
Q: What are the effects of buffer solutions and what is its importance to life processes?
A: A buffer solution is an aqueous solution consisting of a mixture of a weak acid and its conjugate…
Q: What is the pH of the solution?
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Q: Why do we want to know the pH?
A: pH is defined as the quantitative measure of the acidity or basicity of aqueous or other liquid…
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Q: What happens to pH of buffer solutions when small amounts of acid and base is added?
A: A buffer is a solution containing a strong acid and its conjugate base or a weak bases and its…
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Q: If 10g of salt was mixed in 1L water. What percent solution will this be.
A: According to the question,Mass of solute = 10 grams = 10gVolume of water = 1L = 1000 mili Liters…
Q: why is the different pH value of tap water and rainwater?
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Q: What happened to the distribution of methylene blue crystals in the beaker water over time? What…
A: Diffusion Diffusion is a process involving the movement of molecules "down the gradient" i.e. from…
Q: if pH level of solution changes from pH 5 to pH 2, how much acidity increased in that solution and…
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Q: What is the pH of a 7.5 × 10⁻⁴ M CsOH solution?
A: Introduction: pH is an indicator which is used to differentiate whether the solution is acidic or…
Q: How does a nitrate addition prevent sulfide souring ofcrude oil?
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Q: What made the pepper on water move upon the addition of the dishwashing liquid?
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Q: In excess of alkaloidal reagent, did the precipitate formed dissolve or not? What is the evidence…
A: Alkaloid reagents such as tannic acid, potassium iodide, potassium ferrocyanide, or mercuric iodide…
Q: What is the role of indicator in determining if the substance is acid or base? (Note that the…
A: pH indicators are compounds which are natural dye. Those indicate if the solution is acidic or basic…
Q: If a more concentrated initial solution bicarbonate was used in beaker C, would it require more or…
A: In a neutralization reaction, number of moles acid and bases are always equal at neutralization…
Q: What quality of zwitterions makes them desirable buffers?
A: A buffer is a solution that can withstand pH changes when acidic or basic components are added. It…
What happened to the pH when the cola and borax solution was added to the water? Explain
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- At a pH of 7.40, the carbonic acid ratio is ________. a. 35:1 b. 4:1 c. 20:1 d. 3:11) Calculate the required gram of Tris-Hcl to prepare 1M, 100 ml Tris-HCl (Tris Stock) with mol and Molarity formula. 2)Calculate the required gram of EDTA to prepare O.5M, 100 ml EDTA (EDTA stock) mol and Molarity formula. 3.) Calculate the required volume of Tris Stock to prepare buffer A which contains 25 mM Tris-Hcl with final volume is 100 ml by using M1V1 =M2V2 formula 4) Calculate the required volume of EDTA stock to prepare buffer A which contains 10 mM EDTA with final volume is 100 ml by using M1V1 =M2V2 formula 5)Do the same for Buffer B calculationsGive full explanation The physcian orders ascorbic acid 0.25mg IM for your patient admitted with an alcohol problem. You have ascorbic acid 500mg/mL. How many milliliters will you administer?
- . A prescriber ordered 240 mL of ¾ strength Sustacal PO B.I.D. Explain how you would use water as a diluent to mix this solution. Show your work with units and describe how much water and how much Sustacal you would use to create this mixture..Solution Absorbance mg/ml aspirin Standard solution - 1.6 mg/mL A 0.638 0.08 mg/mL B 0.504 0.064 mg/mL C 0.376 0.048 mg/mL D 0.259 0.032 mg/mL E 0.126 0.016 mg/mL A = -log T where T = %T ÷ 100 Construct a callibration curve using the above data. Absorbance should be on the vertical axis and "mg/mL of acetylsalicylic acid" on the horizontal axis. The line should go through the origin. Using the data provided, the graph you have generated, and the procedure that was used to generate the solutions which were examined by spectroscopy, calculate the amount of acetylsalicylic acid per tablet. Commercial tablet 1 labelled as 100 mg enteric coated Absorbance = 0.16 Commercial tablet 2 labelled as 300 mg Absorbance = 0.45 Student prepared tablet from practical 5 Absorbance = 0.19 Using the data provided, the graph you have generated, and the procedure that was used…Draw titration curve for compound X when NaOH equivalence(s) is/are added. Indicate the buffering region(s) with a box.
- Calculate pH of buffer prepared by mixing; 10ml of 0.10M of CH3COOH and 20ml of 0.10M of CH3COONa.I. Give concentration in units of mg/ml for the following solutions. 50 g/liter 0.5 g/ml 5mg/ml 500 mg/liter Show your workRefer to the following titration curve below: 13 12 11 10 7 5 4 3 2 8 10 12 14 16 18 20 22 24 26 28 30 Volume of Titrant / mL Unknown Acid 0.10 mol/L - titrant = NaOH 0.1 mol/L How many buffering regions are present in the titration curve of the amino acid?