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Define amphoteric behavior and give an example of it other than the one given in your lab manual. Why is it good to form only one precipitate when analyzing your unknowns? Why is it important to perform the ammonia tests with no other sets of cations in the tray? True or False: Confirmatory tests should always be carried out initially on a known sample of cations. Explain. If you add a silver ion solution to a carbonate ion solution a brown precipitate forms. What can this precipitate be? Explain possibilities and the way to determine what it actually is.
biacetyl the flavoring that makes margarine taste just like butter is extremely stable at room temperature but at
a gas is contained in a 5.0 l container at a pressue of 100kpa. what size container would be required to contain the
What observed rotation is expected when a 1.10 M solution of (R)-2-butanol is mixed with an equal volume of a 0.550 M solution of racemic 2-butanol,
Nitrogen and Oxygen form an extensive series of oxides of general formual NxOy; at least 7 are known. One of them is a blue solid that comes apart reversibly in the gas phase. It contains 36.84% N and the rest is Oxygen. What is the empirical form..
Calculate the molar concentration of HCl in a solution that has a specific gravity 1.185 and is 36.5% (w/w). Prepare from this bottle 1 L of 0.1 HCl solution. 25 mL of this solution titrated with 30 mL of NaOH.
The following questions pertain to the magnitude of the x-component of the speed(absolute value of the velocity) cx=|vx| of atoms in a gas, whose probability distriubution has the form P(cx)= ae^-bc2/x. Write down the integral you would need to eva..
Calculate the solubility (in M units) of ammonia gas in water at 298 K and a partial pressure of 7.50bar . The Henry's law constant for ammonia gas at 298 K is 58.0 M atm and 1 bar = 0.9869 atm.
Using the following equation for the combustion of octane (C8H18) , calculate the heat of reaction (enthalpy change) when 100.0 g of octane C8H18 reacts with oxygen in a combustion reaction. The molar mass of octane is 114.33 g/mole.
A concentration cell consists of two H2/H+ electrodes. Electrode A has H2 at 0.83 atm bubbling into 0.29 M HCl. Electrode B has H2 at 0.56 atm bubbling into 1.8 M HCl.
A piece of metal, mass of 8.50 g is heated to a temperature of 95.00 c. It is immediately placed in a calorimeter. Find the specific heat capacity?
The reactant concentration in a first-order reaction was 6.70×10-2 after 25.0 and 3.30×10-3 after 100 . What is the rate constant for this reaction?
A mixture of 1.07 g H2 and 1.50 g He is placed in a 1.00-L container at 30.°C. Calculate the partial pressure of each gas and the total pressure.
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