what will be the possible results in testing the solubility of oil in the water?
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what will be the possible results in testing the solubility of oil in the water?
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- You are asked to design three buffers of the following pH values: 9.10, 10.45, and 4.65. You have the following 0.10M solutions available: CH3COOH, CH3COONa, NH4Cl, NH3, NaHCO3, and Na2CO3.Which solution will you choose to design each buffer?pH 4.65 ___________________________________________________ pH 9.10 ___________________________________________________ pH 10.45 __________________________________________________There is An order is received for 10 fl oz of a 5% solution. In stock is a 10% solution. How many milliliters of a 25% solution are needed?Answer __________ How many milliliters of water are needed?Answer __________Will the given lipid test positive in the Ninhydrin test?
- When conducting a flame test for sodium iodide, is the result positive or negative?A 25.00 mL sample of 0.320 M LIOH is titrated with 0.750 M HNO3 at 25 °C. Calculate the initial pH before any titrant is added. pH = Calculate the pH of the solution after 5.00 mL of the titrant is added. pH =A 1–fluid ounce (29.573 mL) solution contains 4.5 grains (291.60 mg) of silver nitrate. How much sodium nitrate must be added to this solution to make it isotonic with nasal fluid?
- The physician has ordered 500,00 units of IV Pfizerpen every 4 hours. How much diluent will you add for a concentration of 500,000 units/mL? How many milliliters will you administer?If skin cleaning solution is to be diluted 1 teaspoon to 64 ounces of water, how much water would need to be added to a container containing 1/4 teaspoon of skin cleaning solution?For the questions below be sure to show your work as well as the answer to the question. In this week's lab you made 100ml of 10x PBS by dissolving 8 g NaCl, 1.2g Na₂HPO4 and 0.2 g KH₂PO4 in water. You then adjusted the pH to 7.0. A) How many mg of KH₂PO4 did you weigh out? B) How many liters of 10x PBS did you make? C) What is the final concentration of NaCl in your solution? (The molecular weight of NaCl is 58.44 g/mol) D) What is the final concentration of Na₂HPO4 in your solution? (The molecular weight of Na₂HPO4 is 141.96 g/mol) E) What is the final concentration of KH₂PO4 in your solution? (The molecular weight of KH₂PO4 is 136.1 g/mol) F) What is the hydrogen ion concentration of your solution (pH=7.0)? G) If the initial pH of your solution was 6.29 would you need to add an acid or a base to adjust the pH of a solution to pH 7.0? 10x PBS is a concentrated stock solution that is used to make more dilute solutions of PBS. Starting with your 10xPBS stock solution, how would you…
- If 400 mL of a 20% w/v solution were diluted to 2 L, what would be the finalpercentage strength?What will you observe when samples of these fats and oils are tested for unsaturation with bromine water? Refer to the table below.75 g of impure sodium hydroxide is added to 250 cm3 of water. 10 cm3 of this impure solution is neutralized by 13,5 cm3 of HNO3concentration 0,2 mol.dm–3.Calculate the percentage purity of the sodium hydroxide.