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Question: A 25.00-mL sample of an unknown H3PO4 solution is titrated with a 0.100 M NaOH solution. The equivalence point is reached when 52.58 mL of NaOH solution is added. What is the concentration of the unknown H3PO4 solution? The neutralization reaction is:
H3PO4(aq) + 3 NaOH(aq) 3 H2O(l) + Na3PO4(aq).
Phosphoric acid is a weak triprotic acid with the formula H3PO4. If you have 50.0 mL of a 1.0 M solution of H3PO4, how many grams of NaOH (MM = 40.0g/mol) should you add to make a buffer with a pH of 7.00?
What volume of 3M H2SO4 is needed to neutralize all of the disodium salicylate and the disodium salicylate and the excess of NaOH present after the initial reaction
Rearrange the equation discovered by Balmer to solve for n2 (get n2 by itself): 1/? = R(1/2^2 - 1/n^2) where: ? = is the wavelength of the photon (E=hc/?) R = Rydberg's constant (1.0974x10^7 m^-1) n1 and n2 are integers where n2 > n1.
What is the pH after 0.150mol of HCl is added to the buffer from Part A. Assume no volume change on the addition of the acid. Express the pH numerically to two decimal places.
The dry ice is allowed to sublime and the mixture is allowed to return to 25.0 degrees Celsius. what is the total pressure in the flask?
A woman has a metabolic acidosis resulting from an increased hepatic production of ketone bodies. for a patient with this disorder a screening test using the nitroprusside reaction can test for the putrescence of ketones in the blood. which of the..
aniline, an organic amine, C6H5NH2, a weak base with Kb of 4.0x10^-10, reacts with water to form its conjugate acid, C6H5NH3^+. write the equation and the base dissociation constant for aniline.
calculate the molarity of acetic acid in a viegar sample knowing that 5.00 ml of vinegar requires 43.50 ml of 0.105 m
The overall equilibrium involves Ksp, Ka3 of phosphoric acid and Kw. Construct the constant and show the three equations that apply.
A 134-mL bubble of hot gases at 217C and 1.79 atm escapes from an active volcano. What is the temperature, in C, of the gas in the bubble outside the volcano if the new bubble is 164mL and the pressure is 0.759 atm?
You place ethanol of 100 grams and water of 100 grams in a refrigerator. both are at room temperature Initially,. Determine which of the two liquid samples will cool faster and also explain why this happens.
what is the phase of matter of the solute and solvent of sterling silver?
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