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A) A 0.030 M solution was prepared by dissolving dipotassium cysteine K2C in water. After that 40.0mL of this solution was titrated with 0.060 M HClO4.
Compute the pH at the first equivalence point.
B) Compute the quotient [C2-]/[HC-] in a solution of 0.050 M cysttainium bromide.
(Amino acid cystein abbreviated as H2C)
a melting point determination of vanillin melting point 80 c was made with a heating apparatus setting at the maximum
Benzoic acid is a weak acid that has antimicrobial properties. Its sodium salt, sodium benzoate, is a preservative found in foods, medications, and personal hygiene products. Benzoic acid dissociates in water: C6H5COOH C6H5COO- + H+
While using the Half Volume method, your solution was dark pink (you overshot the endpoint) and you added the unreacted acid to this solution
The mass of a cube of iron is 392 g. Iron has a density of 7.87 g/cm3. What is the mass of a cube of lead that has the same dimensions?
Calculate the amount of isopentyl acetate that should be present in the reaction mixture at equibrium, based on the quantities of starting materials you used and a value of 4.2 for the equilibrium constant
A mass of 1.50 g H2O is sealed in an evacuated 3.0-L flask and heated to 55 °C. What mass of liquid water remains in the flask when equilibrium is established? The equilibrium vapor pressure of water at 55 °C is 118 mm Hg.
Describe how you would purify p-nitrobenzoic acid from a mixture of a 9.0 g of p-nitrobenzoic acid and 2.0 g of o-nitrobenzoic acid using recrystallization.
density of gold is 19.31 gcm3density of platinum is 21.43 gcm3if equal masses of gold and platinum are transferred to
A stream of air (21% O2 m, the rest N2) flowing at a rate of 10.0 kg/h is to be mixed with a stream of CO2 inside a mixer. The CO2 enters the mixer at a rate of 20.0 m/h at 150 ?C and 1.5 bar. What is the mole percent of CO2 in the product stream
The crystal structure of an element X can be described as follows: X atoms form a face-centred cubic lattice with an edge length of 356.7 pm. In addition, there are X atoms occupying every other tetrahedral site in the face-centred cubic lattice.
You have 100.0 mL of a solution of hydrochloric acid that has a pH of 3.00. You add 100.0 mL of water to this solution. What is the resulting pH of the solution?
Photosynthesis by land plants leads to the fixation each year of about 1 kg of carbon on the average for each square meter of an actively growing forest. The atmosphere is approximately 20% O2 and 80% N2, but contains 0.046% CO2 by weight. What vo..
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