1. a. Tris (C4H6(OH)3NH2) has a Ka of 7.94 x 10−9. Calculate the Kbfor this compound. b. If a chemist was to make 50.0 mL 0.20 M solution of Tris, what would the pH be after an addition of 10.0 mL of 0.10 M HCl?

Q: An acid (HA) dissociates as follows: HA → H* + A minus Arrow should be interpreted as an equilibrium…

A: Given :-  HA <-----> H+ + A-  Initial concentration of HA = 0.37 M  pH = 4.91   To be…

Q: Which of the fellowing aqueous solutions are good buffer systems? O0.38 M hypochlorous acid + 0.25 M…

A:

Q: a When you add solid sodium oxalate, Naz C2 04, to 50.0 mL of 0.015 M oxalic acid, H2 C204, what…

A:

Q: Determine the pHof a solution prepared by dissolving 35.0g of solid (CH3)NH2CL in 1.00L of 1.10M…

A: At equilibrium (CH3)2NH hydrolyzes as,                                            (CH3)2NH + H2O ⇌…

Q: ou dissolve 4.12 g of potassium formate (KCHO2) in sample water in the laboratory to make 322.00 mL…

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Q: A solution is prepared that is initially 0.0010 M NaOH and 0.10 M NH3. What is the pH of this…

A: [NaOH] =0.001 M [NH3] = 0.10M

Q: Calculate the pH of a solution initially with 0.10 M NaHSO4 and 0.10 M NH3.

A: The balanced reaction for the above process is :                  NaHSO4 +NH3 ------------>…

Q: Determine the pH of the resulting solution when the following two solutions are mixed: 50.0 mL of…

A: The given information is: Volume of HNO2 = 50ml = 0.050 L Concentration of HNO2 = 0.500 M Volume of…

Q: 3. What mass of NaA (MW=100 g/mole) must be added to a 100.0 ml of a 0.1 M solution of HA…

A: Buffer solution: The solution that resists the change in pH is known as a buffer solution. The…

Q: Calculate the pH of a solution prepared from 0.200 mol of NH,CN and enough water to make 1.00 L of…

A: Given :  To calculate the pH of a solution prepared from 0.200 mol of NH4CN and enough water to make…

Q: Which mixture of equal volumes of the following solutions will produce a buffer solution? O A. 0.3 M…

A: A buffer is a mixture of weak acid and its conjugate base (acidic buffer) or weak base and its…

Q: (a) What is the pH of () 0.10 М КОН(аq) (ii) 0.15 M HNO3(aq) (iii) the solution resulting from the…

A:

Q: Which of the following aqueous solutions has the lowest pH: 0.1 M HCL; 0.1 M acetic acid (pKa=4.86);…

A: Both the acetic acid and formic acid are weak acid . Thus they dissociates very small. Thus…

Q: How much 0.573 M KOH will be needed to raise the pH of 0.215 L of 3.23 M carbonic acid (H2CO3) to a…

A: Carbonic acid and base both are acid and base so will give salt  Resultant solution is Acidic…

Q: 8. A 1.0 M Na,X solution has a pH of 13.333 and an equilibrium [HX-] of 0.2149 M. Calculate K and…

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Q: What volume of 0.855 M KOH solution is required to make 3.55 L of a solution with pH of 12.4?

A:

Q: The sample of 30.00 mL of 0.015 M HClO is titrated with a 20.00 mL of a 0.015 M NaOH solution.  (c)…

A: The reaction can be given as follows: HClO(aq)+NaOH(aq)→NaOCl(aq)+H2O(l) Molarity of HClO = 0.015 M…

Q: How many milliliters of 0.500 M NaOH should be added to 10.0 g of tris hydrochloride (157.6 g/mol)…

A: Given data contains, Grams of tris hydrochloride=10.0 g. pKa=8.072 pH=7.60 Molarity of NaOH=0.500 M

Q: 35. What is the pH of the resulting solution when 0.20 mol of HCl is added to 0.250 L of water?

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Q: 3. How many moles of hydroxide will be leftover if I add 100 mL of 0.5 M solution of KOH to 50 mL of…

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Q: A chemist makes a 1.0 L of a solution that is both 0.6 M NH, and 0.8 M NH,CI. pK, of NH3 = 4.75.…

A: Given :-  Concentration of NH3 solution = 0.6 M  Concentration of NH4Cl = 0.8 M  Volume = 1 L  pKb…

Q: 9. An unknown salt is either: NaF, NaCl or NH,CI. When 0.1 mol of the salt is dissolved in 1.0 L of…

A:

Q: Which of the following is the example(s) of acid-base reaction? H H `H H -Br II IV OH H-CI OH

A: Acid- The species which is able to donate H+ ion.   Base-  The special which is able to accept H+…

Q: Consider 20.00 mL of a 0.40M hypothetical weak acid solution, HA. The K, = 3.3 X 106 for this weak…

A: Given: Volume of weak acid, HA = 20.00 mL Molarity of HA = 0.40 M Volume of NaOH = 20.00 mL Molarity…

Q: How many grams of solid ammonium chloride should be added to 1.00 L of a 0.243 M ammonia solution to…

A:

Q: 2. Calculate the pH of the following aqueous solutions: a. 1.5 x 10 $ M HCI b.1.0 mL of sample a in…

A: pH is used to determine the concentration of hydronium ion.

Q: What volume (in mL) of 8.84 M HBr would be required to make 300.0 mL of a solution with a pH of…

A: The molarity of the stock solution is = 8.84 M The volume of the desired solution is = 300.0 mL The…

Q: If we combine 40.0 mL of a 0.100 M HNO3 solution with 60.0 mL of a 0.100 M ethylamine solution, what…

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Q: An acid solution is made by diluting 30.6 mL of 0.2360 HI to 1.000 L. 1. What is the pH of this…

A: pH measures the acidity of the solution. The concentration of hydronium ion. pH determined as…

Q: 6- Calculate the mass of HONH2 required to dissolve in enough water to make 250.0 mL of solution…

A:

Q: What volume (in mL) of 8.84 M HBr would be required to make 300.0 mL of a solution with a pH of…

A: Given data of the following, M1 = 8.84 M , V1 = ? For second case, pH = 3.15, V2= 300.0 ml

Q: Calculate [OH]in a solution obtained by adding 1.00 g solid KOH to 1.00 L of 10.0 M NH3. (Kb of NH3…

A: The mass of KOH added to 1.00 L of 10.0 M NH3 is 1.00 g. The dissociation constant of NH3 is…

Q: What mass of HI should be present in 0.250 L of solution to obtain a solution with pH value of 2.85.…

A: • Concentration = No. of molesVolume (L)• Mass = No. of moles × Molar mass• pH = -Log[H+}        ⇒…

Q: 9. Predict the pH of the resulting solution when we mix 50.0 mL of 0.010 M HClO with 50.0 mL of…

A: We'll answer the first question since the exact one wasn't specified. Please resubmit a new question…

Q: Which one has the highest pH? pks values CSHSN 8.77 CH:NH2 3.36 NH:OH 7.96 CeHsNH2 9.41 N2H4 5,89

A: Acid is a substance which donates H+ ion when dissolved in water.  Base is a substance which accepts…

Q: The pH of a solution of 19.5 g of malonic acid in 0.250 L is 1.47. The pH of a 0.300 M solution of…

A: Given: The amount of malonic acid dissolved in 0.250 L is 19.5 g. The pH of malonic acid and 0.300 M…

Q: A reaction requires the addition of 350.0 mL of a solution with a pH of 3.50. What mass of HNO3 (in…

A: pH :-  The negative logarithm to the base 10 of hydrogen ion concentration of a solution expressed…

Q: Calculate the volume, in milliliters, of a 0.520 M KOH solution that should be added to 4.000 g of…

A: Data given:  Molarity of KOH solution = 0.520 M = 0.520 mol/L (M = mol/L)  Mass of HEPES = 4.000 g…

Q: What volume of 2.036 mol L-1 solution of LIOH is required to make 7.80 L of a solution with a pH =…

A: Given :-  Initial concentration of LiOH solution = 2.036 mol.L-1  pH of final solution = 12.80…

Q: What volume (in mL) of 8.84 M HBr would be required to make 300.0 mL of a solution with a pH of…

A: Since HBr is strong acid  Hence it will dissociate completely via below reaction HBr ------> H+ +…

Q: 21) What will be the pH (aq., 25 °C) of 100.0 mL of a solution of 1.00 M C̟H̟NH̟B and 1.50 M C,H,NH,…

A: Firstly Calculate the mmoles of salt, weak base and acid :  salt : C2H5NH3+  , weak base : C2H5NH2…

Q: Calculate the pH for 2.250 g of LIOH in 250.0 mL of solution.

A:

Q: In a buffer solution, if [A] pKa Oe. pH > 7.00

A: A buffer solution is formed when there is a solution of a weak acid and its conjugate base or a weak…

Q: What concentration of KNO2 must be added, at 25 degrees Celsius, to 0.50 M HNO2 to result in a…

A: The solution mixture is a buffer solution of weak acid HNO2 and conjugate base NO2- ( as KNO2…

Q: 6. Calculate pH for the 0.05 M Ca(OH)2 and 0.01M HCl and explain the natures of the solutions after…

A: Ca(OH)2 pH-13 HCl pH- 2

Q: Qt) what is the pH of abinffer whhich has been prepared by miking 25O m Ml,cl ncl 200 ml , 01 M NHg…

A:

Q: b) 10.5 ml of x M hypochloric acid, HOC? , is diluted to 250 ml. I) Calculate the value of x If the…

A: i) Determination of x from Molarity equivalence relation: M1V1=M2V2x×10.5 mL=0.15 M×250 mLx=3.57 M…

Q: 20) What will be the pH (aq., 25 °C) of 250.0 mL of a solution of 0.545 M HCOOH and 0.628 M HCOOK,…

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Q: A solution with a volume of 1.00 L is 0.350M in CH3COOH(aq) and 0.450 M in CH3COONA(aq). What will…

A: We have a buffer solution of acid  CH3COO-Na   and salt CH3COOH      From the Henderson-Hasselbach…