please help. Thanks! 18. A dynamic equilibrium is reached when phosphoric acid, HsPO, is dissolved in...
Acid-base titration questions. Please help! Thanks.
2. Given that 20.00 mL of phosphoric acid solution required 15.50 mL of 0.200M NaOH for the first equivalent point. What is the molarity of the phosphoric acid? 3. A student titrated 25.00 mL of cola and it required 18.27 mL of 0.0100 M NaOH to reach the 1'equivalence point. Calculate the molar concentration of phosphoric acid in this brand of cola. 4. If the density of the "Cola" drink is 1.00 g/mL. What...
For this same problem I need part B and C
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Revie A125" phosphoric acid, H,PO, has the following equilibrium constants H,PO () + H2O(l) = H.PO, ( +H2O(1) HPO," (4) + H2O(1) H,O () + HPO, () H.O( +HPO, (aq) H.O(g) + PO, (n) = = 7.5 x 10-4 6.2 x 10 1.2 x 10-3 Ka Part A What is the pll of a solution of 25 MK,PO, potassium phosphate? Express your answer numerically to the hundredthis place. View...
Write an equation to illustrate the equilibrium that is present when propanoic acid is dissolved in water.
4. When the weak acid HN; (K4 = 1.9 x 10-) is dissolved in water, which species has the largest molar concentration? A OH B. H30+ C. HN3 D. N3
please answer question 6 & 7 and explain
not equation given
L.2 yhen dissolved in water and neutralized with NH, AgCI forms the following species 1.2 r 4 (o) (ay) 2(04) Mag) Write the charge balance for the equilibrium. [5) a. hat b. Write the mass balance for the reaction in silver (ie. lAgamobed).15 7. Beginning with the phosphate anion, show the stepwise process by which one obtains HsPO, in aqueous solution. Label equilibrium constants. [10 -o -at the near...
Determination of the Dissociation Constant ka, of a Weak Acid Part A Phosphoric acid is a triprotic acid (three ionizable hydrogens). The values of its stepwise ionization constants are Kit = 75 x 10°,K6.2 x10, and K. = 4.2 x 10" 1. Write the chemical equation for the first ionization reaction of phosphoric acid with water. 2. Write the equilibrium constant expression Kat for this reaction. 3. What would be the pH of a solution when [H,PO) -(H.PO:] Part B...
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QUESTION 31 (5 marks) The equilibrium constant at 37°C for the reaction cisaconitate isocitrate 2.5. reaction mixture is prepared with isocitrate at a concentration of 0.2 M, and cisaconitate at a concentration of 0.001 M. Which species is favoured (present in greater amount) when the system is at equilibrium? fraducts Calculate the free energy change for this reaction under these conditions. G RT E -3 x 10 x 2 . C .31 XiD G 20-1 Answer...
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Answer: 29) Consider the following generalized buffer solution equilibrium: When a small amount of a strong base such as sodium hydroxide is added to the solution, which of the four species shown would experience an increase in concentration? A) BH B)H C) HO D)B E None of the species would increase in concentration. Answer: ( 30) What is true about a solution whose pH is less than 7 at 25°C? A) It has...
When 0.070 mol of propionic acid, C2H5CO2H, is dissolved in 450 mL of water, the equilibrium concentration of H3O+ ions is measured to be 2.19 x 10−3 M. What is Ka for this acid?
When 0.070 mol of propionic acid, C2H5CO2H, is dissolved in 300 mL of water, the equilibrium concentration of H3O+ ions is measured to be 2.01 x 10−3 M. What is Ka for this acid?