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A 50.00mL water sample required 11.00mL of 0.1000 M EDTA to titrate the free Mg in a water hardness determination, given a sample pH = 10.00. Explain what was the concentration of Mg in the sample expressed as ppm Mg. The atomic weight of Mg is 24.30 g/mole.
Explain what was the Conditional Formation Constant for the formation of the EDTA complex for Mg under these conditions?(KMgY2- = 4.9*109)
Galvanized nails are iron nails that have been plated with zinc to prevent rusting. The relevant reaction is Zn2+(aq)+2e- -> Zn(s) For a large batch of nails, a manufacturer needs to plate a total zinc mass of 1.60 kg on the surface to get adequat..
Calculate the equivalent height a column of mercury would have if mercury were esed instead of wted in the flask.the density of mercury is 13.6 g/cm3
HBr is an acid. Please write a chemical equation showing how it is an acid according to the Arrhenius definition. The response has to be in the form of a balanced chemical equation with all phases included.
The glutamate and ammonia reaction can couple with the hydrolysis of ATP (such as shown above). What is delta G ran and K for this coupled reaction
A 70.4 g ice cube floats in the Arctic Sea. The temperature and pressure of the system and surroundings are at 1 atm and 0°C. Calculate Ssys, ?Ssurr, and ?Suniv for the melting of the ice cube.
A 200. mL air sample collected at 35°C has a pressure of 550. torr. What pressure will the air exert if it is allowed to expand to 425 mL at 48°C?
Determine What is the ? Ssys for the process?(if it is given the specific heat capacity for ethanol is 2.42 J/g K.) express your answer in units of J/K
Draw the structures of the following amines and classify each as 1 degree, 2 degree, 3 degree, or 4 degree amine. Include Hydrogen Atoms.
Draw the structure of an eight-carbon alkene that would yield the following compound after treatment with ozone followed by dimethyl sulfide
What is the pH at the stoichiometric point (end point) for the titration of 50 ml of 0.20 M methyl amine CH3NH2 (aq) with 0.20 M perchloric acid HClO4(aq)? For methyl amine (CH3NH2), Kb = 3.6 x 10^-4.
One mole of an ideal gas is contained in a cylinder with a movable piston. The temperature is constant at 77°C. Weights are removed suddenly from the piston to give the following sequence of three pressures.
In an equation for neutralization reaction that forms an aqueous solution of calcuim nitrate, the reactantsmight be
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