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Prepare your solvent, which will be a 1.0 M Metal Free HCl solution. First, calculate the volume of the concentrated acid necessary to prepare 600.0 mL of 1.0 M HCL. (I believe we are give 3 M HCl to dilute here). Put about 300 mL of DIW in your 800 mL beaker, and then VERY carefully add the calculated volume of concentrated HCl to the water. YOU SHOULD ALWAYS ADD ACID TO WATER, NOT THE OTHER WAY AROUND. Do not pour the acid from the large bottle into your graduate cylinder; instead pour it first into a beaker then pour from the beaker into your graduated cylinder. After adding the acid, fill the beaker to ~600 mL and then transfer your solution into your 1.0 L stoppered bottle and label the bottle. You will use this solvent for the next two weeks.
Prepare a calcium standard solution by accurately weighing between 0.35 - 0.40 g (I'm using .38 specifically) of standard calcium carbonate and quantitatively transferring the solid to a 250 mL beaker. Slowly add dropwise 6 M HCl until the sample stops effervescing and completely dissolves. Make the volume up to about 50 mL with DIW. Quantitatively transfer the solution into a 250 mL volumetric and dilute to the mark. Mix the solution carefully. Calculate the concentration of the Ca2+ in ppm (or mg/L) using the correct number of significant figures assuming the 1.0 HCl has a density of 1.000 g/mL. Show these calculations clearly in your notebook and on your report form. Recall that calcium is only ~40% of the CaCO3.
Determine the pH of a 0.432 M sodium acetate (NaC2H302) solutions
Compound A, C6H10O2, is optically active. It dissolves slowly in aqueous NaOH, consuming one equivalent of base. When the solution is acidified, A is slowly regenerated.
A sample of oxygen that occupies 1.00 × 10-6 mL at 575 mm Hg is subjected to a pressure of 1.25 atm. What will the final volume of the sample be if the temperature is held constant
what is the strongest intermolecular force in a liquid containing molecules
What would the solubility of copper (II) tartrate be in a solution that contains 0.12 M sodium tartrate?
Gold can be hammered into extremely thin sheets called gold leaf. A 210. mg piece of gold (density = 19.32 g/cm3) is hammered into a sheet measuring 4.2 1.0 ft. What is the average thickness of the sheet in meters? GIVEN: 2.54 cm = 1 inch
Make a rough calculation of the amount of CO2 exhaled by a person in day. With this, and assuming a space crew of five, how much LiOH must be taken in a seven day mission? Take into consideration a safety factor of 200%.
Suggest a reason why the cyclic intermediate in the formation of methyl-e-4-methoxycinnamte from p-anisaldehyde, might have two important groups in a trans relationship
at 710. mm hg a sample of nitrogen gas occupies 625 ml what volume does the gas occupy if the temperature constant and the pressure increases to 760. mm hg
Instant cold packs used to treat athletic injuries contain solid NH4NO3 and a pouch of water. When the pack is squeezed, the pouch breaks and the solid dissolves
Draw a phase diagram labeling all the above points. Also label the melting point curve, the boiling point curve, and the solid, liquid, and gas regions.
A 2.5-L sample of a 6.3M NACl solution is diluted to 75L.What is the molarity of the diluted solution?
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