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A boy wants to prepare a 250mL of a buffer that is pH=4.50. Beginning with 100mL of 0.12 mol/L CH3COOH and a supply of 0.10mol/L sodium hydroxide, explain how it can be done. How much 0.20mol/L sodium hydroxide should be combined to this buffer to raise the pH to 5.1? If the same amount of 0.20 mol/L sodium hydroxide were combined to 250mL of deionized H2O, Determine New pH?
What is the heat change in J associated with 37 g of gaseous methanol at 89 oC changing to liquid at -64 oC?
For which elements (main group or transition) do the numbers of electrons in the outer or valence, shell correspond to the group number
How many grams of hydrogen are collected in a reaction where 1.92 L of hydrogen gas is collected over water at a temperature of 40C and a total pressure of 738 torr.
The Born-Haber cycle is a series of steps that represent the formation of an ionic compound from a metal and a nonmetal. For example, the steps in a Born-Haber cycle for the formation of NaCl(s) consist of sublimation of the metal Na atom
Designing and preparing aqueous buffer solution with the pH indicated - Give complete details of the design and preparation of an aqueous buffer solution (volume 100ml) with the pH indicated.
To what volume should you dilute 150 mL of an 8.00 M CuCl_2 solution so that 55.0 mL of the diluted solution contains 5.9 g CuCl_2
KOH in a coffee-cup calorimeter at 23.50°C, the temperature rises to 30.17°C. Calculate H of this reaction per mole of H2SO4 and KOH reacted.
salicylic acid with methanol to yield methyl salicylate why wouldnt you use a strong base like sodium hydroxide?
Which of the following changes to a voltaic cell would cause an increase in potential (i.e., more positive Ecell)
400cm3 of glycerol, C3H8O3 (density= 1.26 g cm-3) is added to a kilogram of water. What is the mole fraction of C3H8O3 in the solution?
Calculate the velocity of a neutron whose de broglie wavelength is 500pm. The mass of the neutron is 1.009 amu.
Predominant Organic Acids Present in Softwoods such as Pine, A wood chemistry course in which we are asked to explain the hierarchy of the organic wood acids present in softwood species like pine or spruce.
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