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A student mistakenly added concentrated (12 M ) HCl to sampleof unknown, instead of adding 6M HCl , as directed(1) At first, a large amount of light-colored precipitateformed, but some dissolved on further addition of concentrated HCl.Write an equations for the reactions that might have occurred.
(2) The precipitate was separated from the supernatant liquidin (1) and was found to be insoluble in hot water. The precipitate turned grey-black upon addition of 6M NH3. The student concluded that the unknown contained Hg2 2+ ion. The student received a low mark on the experiment, because the unknown actually contained all these group 1 cation. Explain what happened.
A solution contains 410.3 g of H2SO4 per litre of solution . If the density is 1.243 g/ml, what will be its molarity and molality.
What is the theoretical yield of SO 3 produced by the quantities described in Part A and How many Oxygen molecules are required to react with 7.82g of S?
Consider the malate dehydrogenase reaction from the citric acid cycle. Given the following concentrations, calculate the free energy change for this reaction at 37.0 °C (310 K). ?G°\' for the reaction is 29.7 kJ/mol.
N-t-Bu-BN-indole undergoes electrophilic aromatic substitution regioselectively at the 3-position. Draw an orbital bonding diagram for N-t-Bu-BN-indole. Show only the p-orbitals that overlap in the aromatic p-system. Which lone pairs must be inclu..
a student was as ked to determine the molecular weight of a weak monoprotic dry acid hx. she was provided the following
At a particular temperature the first-order gas-phase reaction2N2O5? 2N2O4 +O2 has a half-life for the disappearance of dinitrogenpentoxide of 3240s. If 1.00 atm of N2O5 isintroduced into an evacuated 5.00L flask, what will be the totalpressure of..
How many kilograms of acetic acid needs to dissolve 94 grams of potassium chloride if the freezing point changed 19.6 degrees celcius?
When nitroglycerin explodes it produces nitrogen, oxygen and water and carbon dioxide. If the heat of reaction is -5692 kj/mol how much heats released when 4.5 g of the explosive reacts
A compound is found to be 26.95% sulfur, 13.43% oxygen, and 59.61% chlorine by mass. What is the simplest formula of the compound?
Suppose that an 85.0 laboratory animal ingested 10.0 of a substance that contained 2.45% by mass , an alpha emitter with a half-life of 24,110 years. What is the animal's initial radiation exposure in Curies
How do I calculate the theoretical pH of a solution made of 25 mL 0.10 M acetic acid and 25 mL 0.10 M sodium acetate
The solubility of an ionic compound M2X3 (molar mass = 200. g) is 2.3 multiplied by 10-17 g/L. What is Ksp for the compound?
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