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A biochemist needs 750 mL of an acetic acid-sodium acetate buffer with pH = 4.50. Solid sodium acetate NaC2H3O2 and glacial acetic acid HC2H3O2 are available. Glacial acetic acid is 99% HCH3O2 by mass and has a density of 1.05 g/mL.
A)If the buffer is to be 0.20 M in HC2H3O2, how many grams of NaC2H3O2 must be used?
B)How many milliliters of glacial acetic acid must be used?
One liter of a gas has a pressure of 150.00 kPa at 25.0°C. If the pressure increases to 600.0 kPa and the temperature to 100.0°C, what would be the new volume of the gas?
magnesium sulphate MgSO4 has an observed osmotic pressure =7.6 atm at the temperature of twenty five degree celsius. Determine the observed van't Hoff factor?
39 ml of .2 M HCL and 50 ml of .4 M NaOH are mixed. After mixing, but before they react, what is the new M of the HCL and NaOH?
Separat the components of a water-insoluble mixture of barium sulfate (BaSO4) and nickel (ii) carbonate (NiCO3). Chemicals provied to aid in the separation and recovery of the 2 component mixturee are HCl(aq) and K2CO3(aq)
Calculate the mass percent of a solution that is prepared by adding 35.9 gram of NaOH to 30.2 g of H2O.
q1.determine the mass of a sample of hg that occupies a volume of 4.75ml if the specific gravity of mercury 13.63.
a equimolar mixture of h2 and d2 effuses through an orifice at a certain temperature. calculate the composition in mole
This solution has an osmotic pressure of 2.60 atm at 25°C. If each molecule of the solute dissociates into two particles (in this solvent), what is the molar mass of this solute?
When light of frequency 6.88×1015 s-1 shines on the surface of a metal, electrons are ejected with a maximum kinetic energy of 3.40×10-19 J. Calculate the wavelength of this light.
The solubility of manganese(II) carbonate is 5.4 × 10-4 g/L. What is the solubility product constant for manganese(II) carbonate
How many grams of ethylene glycol C2H6O2 must be added to 1.15kg of water to produce a solution that freezes at -3.68 degrees celsius?
What is the thickness of the resulting SiO2 water? The molecular weights of Si and SiO2 are 28 and 60 g/mol, respectively. The densities of Si and SiO2 are 2.33 and 2.27 g/cm3, respectively.
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