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a 0.700 g of a weak monoprotic acid (ha) is dissolved in sufficient water to make 50.0 ml of solution and titrated with 0.155M NaOH solution. A ph of 5.85 is recorded after addition of 12.5ml of base . the equivalence point is reached after addition of 25.0 ml Naoha) calculate the ionication ka for the acid HA
b) calculate the molar mass of the acid Ha
Determine which species is present in the lowest concentration in 0.10 M H3A solution?
Calculate the specific heat capacity of the metal when the final temperature of the mixture =38.7?C.? (Assume that there is no energy lost to the surroundings.)
The piston is then moved in and the heat rejected by the air reversibly at constant pressure until the volume is= initial volume. compute The net heat flow and the overall change in entropy?
Calculate the final temperature of 37 mL of ethanol initially at 11 degrees C upon absorption of 624 J of heat. (density of ethanol =0.789 g/mL).
The magnesium and calcium ions present in seawater([Mg2+] = 0.059 M and [Ca2+] = 0.011 M) can be separated by selective precipitation with KOH.
Say, for example, that you had prepared a Buffer, in which you mixed 8.203 g of sodium acetate, NaC2H3O2, with 100 ml of 1.O M acetic acid. What would be the initial pH of Buffer C.
What is a catchy, orignal slogan for the element neon that describes one of its important uses?
A 10.0 balloon contains gas at a pressure of 640 torr. What is the new pressure of the gas at the 22.0 liters volumes if there is no change in temperature.
What is the ratio of the enantiomeric products? b) What name is given to a mixture of enantiomers present in the ratio determined in part (a)?
A 91 gram solution of silver nitrate contains 8 grams of AgNO3. What is the percent by mass of silver nitrate in this solution.
A certain quantity of gas occupies 61.3 mL at 68C. If the pressure remains constant, what would be the volume of the gas at 128C?
A 0.0100 molal aqueous solution of a weak acid freezes at -0.0205 oC. Calculate the percent ionization of the weak acid, HA.
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