### Prepare total phosphate concentration

Assignment Help Chemistry
##### Reference no: EM13125765

Description of Quant problems
Prepare 1.00L of a pH~12 buffer with a total phosphate concentration of 0.050 M.You have at your disposal the following compounds
Compounds:
H3PO4 Ka=7.11*10^-3 FW=97.9950
NaH2PO4 Ka=6.34 * 10^-8 Fw=119.9769
Na2HPO4= ka=4.22*10^-13 fw=141.9588
Na3PO4 Fw=163.9407

Which two compounds would you use to prepare a buffer of ph~12 and how many grams of each of the two selected compounds would you need

A 0.020 F solution of succinic acid (pKa=4.20, pKa2=5.64) is buffered at pH 5. what fraction of the succinic acid is present as the amphiprotic form at this pH

#### Questions Cloud

 Connection between the novels : The Connection between the novels A moveable feast and Where Good ideas come from Estimate the total cost to manufacture : Given this data what is the best estimate of the total cost to manufacture 8,900 units is closest to what amount? Calculate average hours of sleep per night for each sample : Calculate the average hours of sleep per night for each sample. According to the 95 part of the 68-95-99.7 rule, 95% of all values of fall within __________ on either side of the unknown mean . What is the missing number? Hypotheses and operationalize : A small suburb of a large metropolitan area has implemented a neighborhood watch program. The mayor has asked you to determine if the program is having any effect on complaints received about suspicious behavior Prepare total phosphate concentration : Prepare 1.00L of a pH~12 buffer with a total phosphate concentration of 0.050 M.You have at your disposal the following compounds Which investment produces the greater after tax income : alva can earn 5% before tax interest on a corporate bond or a 4% dividend on a preferred stock. Assuming that the appreciation in value is the same, which investment produces the greater after tax income? How reject null hypothesis that mean breaking load is more : At the 5% level of significance, would we reject the null hypothesis that the mean breaking load is 510 pounds or more? Illustrate what would be the total production engineering : Illustrate what would be the total production engineering cost per unit, both fixed and variable, at an activity level of 8700 machine hours in a month? Leaving a taxable estate : Barry made taxable gifts as follows: \$400,000 in 1973, \$200,000 in 1974, \$600,000 in 1985, and \$700,000 in 2001. In 2009, Barry dies leaving a taxable estate of \$4,000,000. Barry's tax base for applying the unified tax rate schedules (for estate t..

### Write a Review

#### How much ice in grams would have to melt

How much ice (in grams) would have to melt to lower the temperature of 355 mL of water from 24 C to 6 C (Assume the density of water is 1.0g/ml.

#### Calculate freezing point of a nonionizing antifreeze soln

calculate the freezing point of a nonionizing antifreeze solution containing 388 g ethylene glycol, C2H6O2 and 409 g of water.

#### What is the theoretical yield of nitrogen monoxide

3.38 grams of nitrogen gas are mixed with excess oxygen gas. The reaction yields 6.63 grams of nitrogen monoxide. nitrogen (g) + oxygen (g) -> nitrogen monoxide (g)

#### How many moles of dihydrogen phosphate ion

In an acid/base titration, knowing that it took 13.14 mili litres of 0.1016 M sodium hydroxide, NaOH to reach the first endpoint of the titration,) from this information, mols of Phosphoric acid present in the sample is 1.335 mols.

#### Recommendation for treating contaminated air streams

What technology or combination of technologies would you recommend for treating the following contaminated air streams?

#### Calculate the standard reaction enthalpy

Calculate the standard reaction enthalpy for the oxidation of nitric oxide to nitrogen dioxide 2 NO(g) + O2(g) → 2 NO2(g)

#### How much ammonium hydroxide is needed

How much ammonium hydroxide is needed to react completely with 75.0g of copper (2) nitrate in a double replacement reaction.

#### What is the molar concentration of fe

If it takes 34.0 mL of 0.0250 M K2Cr2O7 to titrate 10.0 mL of a solution containing Fe2+, what is the molar concentration of Fe2+.

#### What is the specific heat capacity of this sample of carbon

The amount of energy needed to heat 2.00 g of carbon from 50.0 C to 80.0 C is 42.6 J. what is the specific heat capacity of this sample of carbon.

#### Calculate the micrograms to the nearest microgram

calculate the micrograms (to the nearest microgram) of iodine per serving in the finished product. Show your work.

#### Determine the volume of a carat diamond

The international unit for weighing diamonds and determine the volume of a 0.76 carat diamond if The density of diamond is given=3.51 g/cm3 ?express your answer in units of cm3

#### How much water (in liters) could be vaporized

If this energy were used to vaporize water at 100.0 degrees, how much water (in liters) could be vaporized.