During your first day on the job as a research assistant, you are preparing 50 mL of hybridization solution with the following components and working concentrations: 50% formamide 5X sodium salt citrate 0.5% sodium dodecyl sulfate You start from the following concentrated stock solutions: 100% formamide 20X sodium salt citrate 20% sodium dodecyl sulfate How much of each concentrated stock solution and water will you add?

Give only typing answer with explanation and conclusion To make a 50 ml 0,05% Tween-20 solution from the stock solution 25% Tween-20. what should be the amount of stock solution you have to use?

The mixture contains benzoic acid, 2-napthol, and naphthalene. Dissolve the mixture in the polar solvent ether. When you react the mixture with 10% NaHCO3(sodium bicarbonatea weak base in aqueous solution) reacts with benzoic acid and forms sodium benzoate an ionic compound (similar to NaCl) that dissolves in aqueous solution (heavier than ether in density) and goes to the bottom of the centrifuge tube or to the bottom of the separatory funnel forming two layers. Then remove the bottom aqueous layer and collect in a beaker labeled as bicarbonate extract. Acidify the bicarbonate extract in the beaker to give benzoic acid. The top ethereal layer contains in the centrifuge tube or separatory funnel 2-napthol and naphthalene. To this top layer add 10% NaOH (sodium hydroxideis a strong base in aqueous solution reacts with only 2-napthol, a weak acid forming 2-napthoxide an ionic compound soluble in aqueous solution (similar to NaCl) that goes to the bottom of the centrifuge tube or to…

Start with 15mL of 0.100M HCl. Pipette 10mL of the 0.100M HCl into a 250mL beaker. Then dilute it to around 100mL with distilled water. What would the concentration of HCl be?

complete the flowchart

How do we keep relative supersaturation low by controlling solute concentration?   concentration should be constant   concentration should be higher   concentration should be lower   concentration should be fluctuating

please calculate the concentration in ppm (last column) for each solution

0.750 g of crude acetylsalicylic acid is recrystallized using ethanol as the solvent. The solubility of acetylsalicylic acid in ethanol at 78 oC is 15.45 g per 100 mL.   a) How much hot ethanol is needed to dissolve the 0.750 g of acetylsalicylic acid?   b) If the solubility of acetylsalicylic acid at 25 oC is 0.100 g per 100 mL, how much acetylsalicylic acid will be obtained after crystallization in ethanol at 25 oC? Use the volume from part A. c) What is the maximum percent recovery for this re-crystallization

You are given an 18% solution of sodium imidazole. What mass of imidazole (in g) would be in 20 mL of this solution?    a. You need to use the sodium imidazole stock solution from Q11 to make a dilute imidazole solution (final volume 180 mL) at      a final concentration of 0.2 M. The molecular weight of imidazole is 90 g/mole.    What volume of imidazole stock would you use (mL)?     b. You need to use the sodium imidazole stock solution from Q11 to make a dilute imidazole solution (final volume 180 mL) at a final concentration of 0.2 M. The molecular weight of imidazole is 90 g/mole.    What volume of water would you add (mL)?

A pharmacist has 50 mL of a 0.5% Gentian Violet solution, what will be the final ratio strength if he dilutes this solution to 1250 mL with purified water? 1:5000 1:500 1:1000 1:8