Explain what mass of nah2po4 must be added to na2hpo4

Assignment Help Chemistry
Reference no: EM13516206

What mass of NaH2PO4 must be added to 1.20 L of 0.20 M Na2HPO4 to make a buffer solution whose pH=6.90? pKa2(H3PO4)=7.21.

Reference no: EM13516206

Questions Cloud

Explain analysis of the barbital content of a sleeping pill : Sleeping pills often contain barbital, which is weakly acidic (pKa = 8.00). For analysis of the barbital content of a sleeping pill, a titration is carried out with strong base. It takes 12.00 mL of 0.200 M base to reach the stoichiometric point.
Compute the magnitude of the net electric field : Four point charges have the same magnitude of 2.57 10-12 C and are fixed to the corners of a square that is 4.20 cm on a side. Determine the magnitude of the net electric field that exists at the center of the square
Writing assignment operating leverage : Writing Assignment Operating leverage
How do structured interviews differ from unstructured : Hoshimi has planned to carry out structured interviews. How do structured interviews differ from unstructured interviews? Which would be more appropriate for this study and why and what are the possible advantages and disadvantages of using face to..
Explain what mass of nah2po4 must be added to na2hpo4 : What mass of NaH2PO4 must be added to 1.20 L of 0.20 M Na2HPO4 to make a buffer solution whose pH=6.90? pKa2(H3PO4)=7.21.
Calculate how far underwater you must dive : When scuba diving, you must equalize the pressure inside your body with the water outside every few meters you dive downward or swim upwards in order to avoid serious health complications. Calculate how far underwater you must dive
Explain hess''s law to calculate the enthalpy : The ionization energy for sodium is 496 kJ/mol. The electron affinity for chlorine is -349 kJ/mol. Use these values and Hess's law to calculate the enthalpy for the following reaction: Na(g)+Cl(g) -> Na+(g) + Cl-(g)
What is the gauge pressure of ocean water : What is the gauge pressure of ocean water at a depth of 73.6 m? The density of ocean water is 1035 kg/m3
How to calculate the concentration of fe2+ in a solution : For FeCO3 dissolving in acid solution, the value of Keq is 0.66, calculate the concentration of Fe2+ in a solution obtained by treating solid FeCO3 with 0.315 M HNO3.

Reviews

Write a Review

Chemistry Questions & Answers

  How many grams of no2 will be produced

how many grams of NO2 will be produced when 2.0 L of nitrogen at 840 mmHg and 24 C are completely reacted N2+2 O2-----2 NO2

  The oxidation-reduction titration with an oxidizing agent

The quantity of antimony in an ore can be determined by an oxidation-reduction titration with an oxidizing agent. The ore is dissolved in hot, concentrated acid and passed over a reducing agent so that all the antimony is in the form Sb3 (aq).

  If sample of lino3nbspis found to contain 203 middot

if a sample of lino3nbspis found to contain 2.03 middot 1018nbspn atoms how many moles of o atoms are present? express

  Describe what masses of hcn and nacn

prepare 3.9L of a HCN/NaCN buffer that has a pH of 9.70 and an osmotic pressure of 1.27atm at 298K. What masses of HCN and NaCN should you use to prepare the buffer

  Explain how would one knows when it is complete

In the lab using conc. HCL and heat, if the solubities of reactant and product were reversed , how would the isomerization be followed. How would one knows when it is complete

  How many milliliters of nahco3 must be poured

an auto mechanic spills 85 mL of 2.6 M H2SO4 solution from a rebuilt auto battery. How many milliliters of 2.5 M NaHCO3 must be poured on te spill to react completely with the sulfuric acid.

  What assumption is necessary in order to do calculations

The expresssion for the freezing point depression of a solution relative to that of the pure solute is shown above. From solutions of known concentrations of p-dichlorobenzene in cyclohexane, you determine Kf, the freezing point depression constan..

  Explain hydrogen fluoride behaves as a weak acid in solution

Hydrogen fluoride behaves as a weak acid in solution. Two equilibria influence which fluorine containing species are present in solution.

  Explain what is the maximum amount of potassium carbonate

What is the FORMULA for the limiting reagent? What is the maximum amount of potassium carbonate that can be formed in grams?

  Determine the natural equilibrium concentration of no in air

Nitrogen oxide is a pollutant in the lower atmosphere that irritates the eyes and lungs and leads to the formation of acid rain. Nitrogen oxide forms naturally in atmosphere according to the endothermic reaction: N2+O2=2NO(g) Kp= 4.1x10^-31 at 298..

  Explain the reaction of a piece of magnesium ribbon

36.8mL of hydrogren gas, from the reaction of a piece of magnesium ribbon with hydrochloric acid, are collected over water in a eudiometer. The temp of the hydrogen gas at 21C, and the atmospheric pressire is 768mmHg.

  How to compare the acid or base strength of compounds

Compare the acid or base strength of the following compounds and explain your ordering by explaining in terms of the difference in the structure.

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd