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We have learned in this chapter that many ionic solids dissolve in water as strong electrolytes, that is, as separated ions in solution. What properties of water facilitate this process? Would you expect ionic compounds to be soluble in elemental liquids like bromine or mercury, just as they are in water? Explain.
Hydrogen phosphate buffer, Buffer solutions have the unique ability to resist changes in PH when an acid or base is added to them. One important buffer system that helps to maintain blood pH at a constant value of 7.4 is the hydrogen phosphate buf..
A student examined a 0.2078g sample containing aspirin using 0.1014M NaOH. The student obtained a % purity of 76.1%. Compute the volume of NaOH that is required in order to reach the end point of the reaction. Molar mass for aspirin = 180.16g/mol
The solubility of AgCl(s) in water at 25 degrees C is 1.33*10^-5 mol/L and its deltaH0 of solution is 65.7 kJ/mol.
Fission of one mole of U-235 releases 1.9 x 1010 kJ. Calculate the number of kg of coal needed to produce the same amount of energy as the fission of 1 kg of U-235 (235.05g/mol)
An emission line from K atoms is found to have two closely spaced components, one at 766.70 nm and the other at 770.11 nm. Account for this observation, and deduce what information you can.
Utilizing bond energies predict he enthalpy change for the subsequent combustion reaction of methane and oxygen- CH4(g) + 2O2(g) = CO2(g) + 2H2O(g)
Al is added to Si to give an extrinsic semiconductor with a conductivity of 2 ( cm)^-1 How many Al atoms are added per cm^3? How many Si atoms are there for each AI atom
Equilibrium shift of the reaction and the pH of solution, 1. The pressure on each of the following systems is decreased from 5 atm to 1 atm. Which way does the equilibrium shift in each of the following systems?
In an industrial preparation of silicon, 155.3kg of SiO2 of is allowed to react with 79.3kg of carbon to produce 66.2kg of silicon. What is the theoretical yield for the reaction in Kg Si
Without using equations, explain why Delta S for a liquid or solid is dominated by the temperature dependence of S as both P and T change.
By requiring to evaluate the integral (Use 100,000 m/s for an upper limit on velocity), determine the percentage of hydrogen atoms that have speed greater than the escape velocity which the maximum season temperature of Mars is 293 K.
a solution of ethanol c2h5oh in water is prepared by dissolving 62.0 ml of ethanol density 0.79 gcm3 in enough water
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