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60mL of a buffer is made up by mixing 38.2mL of 0.100 Macetic acid and 21.8mL of 0.100 M sodium acetate. The buffer has apH of 4.5. Calculate the concentration [HA] in this buffer.
Heavy metal azides,which are salts of hydrazoic acid, HN3, are used as explosive detonators. A solution of 0.20 M hydrazoic acid has a pH of 3.21.
Calculate and prepare the necessary volume of 0.1 M NaOH that will be sufficient for all the solutions. Using NaOH pellets, prepare a 100 μg/ml (ppm) vanillin stock solution in 0.1 M NaOH using a
The pH of a 0.75 M aqueous solution of a weak base, B, at 298 K is12.4. What percent of the base has reacted? i.e. what is the percent ionization of this base?
Calculate the amount of cupric nitrate tihydrate (molar massof 241.60 gram/mole) required to prepare each standard listedbelow. Note: The standards are to be prepared in terms of Cu.Remember that co
Formic acid has molar mass of 46.03 g/mol and is composed of 26.1%C, 4.38% H and 69.52% O by mass. What is the molecular formula for this substance (list elements in the formula in the same order as
The atmospheric sulfur dioxide (SO2) concentration over a certain region is 0.12 ppm by volume. Calculate the pH of the rainwater due to this pollutant. Assume that the dissolution of SO2 does not a
4.38-g sample of bromine was reacted with oxygen to form anoxide with a mass of 10.0 g. Calculate the percent composition of the compound
Calculate the concentration of vanillin in the imitation vanilla extract in mg/ml and find the total mass of vanillin (ing)in one bottle, (one bottle - 8 fluid oz.) Assume the density = 1.00 g/ml
How do you calculate the percent yield of a product from H-NMR peaks? Not using any other method, they are not available. The only information we have now is the H-NMR's we ranof our products.
The solubility of compound X in water is208 g X/100g of water at 15 C. A solution of X in water at 35 C is made by dissolving 324g in 100g of water. When the water is slowly cooled to 15 C, no perci
If your 10 ml water sample requires 15.1 ml of 0.00282M silver nitrate to reach the orange endpont, what is the ppm of chloride in your sample? given for this particular batch of 0.008282M sil
A sample of an ionic compound NaA, where A- is the anion of aweak acid, was dissolved in enough water to make 100.0 mL of solution and was then titrated with0.100 M HCl.
What is the boiling point of the water in your radiator if 2.00 kg of antifreeze (ethylene, glycol C2H6O2) is added to 9.0*10^3 grams of water?
We place a pot of 200 grams of water over a flame. the waterin the pot increases in temperature from 20 degrees celcius to 25degrees celcius. how much heat in joules is absorbed? how much heat in jo
As sodium chloride solution is added to a solution of silvernitrate, a white precipitate forms.Ammonia is added to the mixture and the precipitate dissolves.
Write the mechanismfor the reaction of the elimination reaction of1-(1-chloropropyl)-2-methylcyclopentane with H2O andprovide the final major product.
What would the 2.26 kg bag of sugar from the previous problem weigh on Jupiter, where the acceleration due to gravity is 2.64times that on Earth?
Calculate the expected change in temperature for 3.5 g ofNH4NO3 dissolved in 100.0 mL ofH2O. Assume that the calorimeter absorbs no heat.(ie Ccal=0)(Remember to use dimensional analysis)
Many cigarette lighters contain liquid butane,C4H10(l). Using standard enthalpies of formation, calculate the quantity of heat produced when3.3 g of butane is completely combusted in air under stan
A compound is 10.2% C4 (by mass). Theother 89.8% is Cl. When 23.6 of it is dissolved in 500g of camphor,the freezing point is depressed from 179.8oC to171.8oC.
A 0.45 M solution of pentanoic acid (CH3CH2CH2CH2COOH) is found tohave a pH of 3.73 at 298K. What is the value of the acid dissociation constant Ka for this monoprotic acid?
A 31.15 ml aliquot of H2SO4 (aq) of unknown concentration was titrated with 0.0134 M NaOH (aq). It took 23.9 ml of the base to reach the endpoint of the titration. What is the concentration (M)of th
This is a section that is going to be part of an upcoming labquiz. The section involves an experiment we have covered thissemester. In the experiment we reacted trans-cinnamaldehyde with benzyltrip
How many calories are obsorbed by a pot of water with a mass of 500 g in order to raise the temperature from 20 degrees celcious to 30 degrees celcious.