What mass of ammonium chloride should be added to 2.55 L of a 0.155 M NHạ to obtain a buffer with a pH of 9.45? (K, for NH3 is 1.8 x 10 .) Express your answer using two significant figures. AE4

Q: A buffer is composed of 0.200 M (CH3)2NH (Kb = 5.9 x 10-4) and O.250 M (CH3)2NH2NO3 . What is the pH…

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Q: Consider a buffer made by adding 132.8 g of NaC₇H₅O₂ to 300.0 mL of 2.31 M HC₇H₅O₂ (Ka = 6.3 x 10⁻⁵)…

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Q: Calculate the pH for a buffer that is 0.050 M benzoic acid and 0.150 M sodium benzoate. The Ka for…

A: The pH of buffer solution can be calculated by using Henderson Hesselbach equation - pH = pKa + log…

Q: How many grams of dry NH,Cl need to be added to 2.00 L of a 0.800 M solution of ammonia, NH3, to…

A: Given, Concentration of NH3, [NH3] = 0.8 MVolume of solution, V = 2 LpH = 8.64Base dissociation…

Q: The Kb of ammonia is 1.76x10-5. What is the pH of a buffer which is prepared by combining 50.0mL of…

A: This question can be solved on the basis of the Handerson hasselbach equation which describes the…

Q: Consider a buffer made by adding 132.8 g of NaC₇H₅O₂ to 300.0 mL of 1.09 M HC₇H₅O₂ (Ka = 6.3 x 10⁻⁵)…

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Q: Consider a buffer made by adding 42.3 g of (CH3)2NH2I to 250.0 mL of 1.42 M (CH:)»NH (Kb = 5.4 x 10…

A: A buffer is made of a weak base and salt of that base. When an acid is added to the buffer, the base…

Q: 4. Calculate the change in pH that results from adding 25 mL of 0.010F HCI to 500ml buffer solution…

A: Given,  [NH3] = 0.25 M  [NH4Cl] = 0.15 M  Volume of the buffer in mL = 500 mL  Volume of HCl added =…

Q: A 1.35 L buffer solution consists of 0.175 M butanoic acid and 0.336 M sodium butanoate. Calculate…

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Q: At 25oC, a 1-L buffer solution is prepared by mixing acetic acid and sodium acetate. A) If the…

A: Use Henderson Hesselbalch's equation to get the pH of buffer solution having weak acid and its salt…

Q: What A chemistry graduate student is given 500. mL of a 1.50M trimethylamine (CH, N solution.…

A: Given: The volume of trimethylamine solution = 500 mL = 0.5 L The conc. of this solution = 1.50 M…

Q: How many grams of hydrofluoric acid, HF, should you add to a 1.65 L of a 2.65 M sodium fluoride…

A: Given: pH = 3.45 pKa = 7.1 x 10-4 Volume, V (NaF) = 1.65 L Molarity, M (NaF) = 2.65 M The strong…

Q: What quantity in moles of NaOH need to be added to 200.0 mL of a 0.200 M solution of HF to make a…

A: Henderson-Hasselbach equation: pH= pKa + log [base]/[acid]. pKa = -log Ka Given, Ka of HF = 6.8…

Q: . What is the pH of a buffer prepared by adding 0.405 mol of the weak acid HA to 0.507 mol of NaA in…

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Q: How many grams of solid sodium hypochlorite should be added to 1.50 L of a 0.185 M hypochlorous acid…

A: The given problem can be solved by using Henderson-Hasselbalch equation as; pH = pKa + log conjugate…

Q: How many grams of solid sodium cyanide should be added to 1.50 L of 0.172 M hydrocyanic acid…

A: The given data contains, Volume of HCN =1.50 LMolarity of HCN =0.172 MpH =8.570

Q: What mass (in g) of sodium formate, HCOONa, must be added to 10.0 L of a 0.483 M aqueous solution of…

A: Here, we have to find the mass of sodium formate that must be added to 10.0 L of a 0.483 M aqueous…

Q: A buffer is made using 50.00 mL of 0.7000 M HA (a weak acid, Ka = 1.000 x 10-5) and 50.00 mL of…

A: GIVEN: Initial concentration of HA=0.7000 M  Initial volume of HA =50.00 mL Initial concentration of…

Q: What mass of ammonium chloride should be added to 2.45 L of a 0.150 M NH3 to obtain a buffer with a…

A: The given buffer solution is a mixture of weak base NH3  and its conjugate acid ammonium chloride…

Q: Consider a buffer made by adding 132.8 g of NaC,H;O2 to 300.0 mL of 1.31 M HC,H;O2 (Ka = 6.3 x 105)…

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Q: Consider a buffer made by adding 42.3 g of (CH3)2NH2I to 250.0 mL of 1.42 M (CH:)2NH (Kb = 5.4 x 10…

A: (CH3)2NH is a weak base and (CH3)2NH2I is its salt with a strong acid HI. Thus, the mixture is a…

Q: 2. Phenol (C6H5OH) has a Ka of 1.6*10-10. Starting with a 100.0 mL solution that is 0.300 M phenol,…

A: Given that : Volume of C6H5OH=100mLIts concentration=0.300 MpH = 10Ka of C6H5OH=1.6×10-10So,…

Q: Consider a buffer made by adding 43.1 g of (CH:):NH21 to 250.0 mL of 1.42 M (CH.):NH (Kb = 5.4 x…

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Q: At 25oC, a 1-L buffer solution is prepared by mixing acetic acid and sodium acetate. A) If the…

A: Given: pH = 5 Ka of acetic acid = 1.8×10-5   Calculation for pKa of the acetic acid: Calculation…

Q: Consider a buffer made by adding 46.9 g of (CH₃)₂NH₂I to 250.0 mL of 1.42 M (CH₃)₂NH (Kb = 5.4 x…

A: Buffer is the solution that resists the change in pH.  This solution tries to main the minimum…

Q: How moles of NH4Cl must be added to 2 liters of a 0.1 M NH3 solution to form a buffer with a pH = 9…

A: The Henderson Hasselbalch equation for basic buffer is given as:

Q: How many grams of solid sodium nitrite should be added to 1.00 L of a 0.227 M nitrous acid solution…

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Q: How many grams of solid ammonium chloride should be added to 1.00 L of a 0.107 M ammonia solution to…

A: Calculate the value of pKa by using Kb value of ammonia,

Q: How many grams of solid calcium cyanide, Ca(CN)₂ must be added to 200.0 ml of 0.370M hydrocyanic…

A: Ca(CN)2+H+ ---->HCN+ Ca2+   pH =pKa+log [CN-]/HCN

Q: What mass of sodium benzoate should you add to 150.0 mL of a 0.17 molL−1 benzoic acid solution to…

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Q: Determine the mass of solid NaCH3COO that must be dissolved in an existing 500.0 mL solution of…

A: Buffer solution is the solution in which on addition of small amount of acid or base the pH of the…

Q: How many grams of solid sodium fluoride should be added to 2.00 L of a 9.37x10 M hydrofluoric acid…

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Q: Consider a buffer made by adding 52.3 g of (CH3),NH2I to 250.0mL of 1.42 M (CH3)¿NH (Kb = 5.4 x…

A: The concentration or Molarity of salt is calculated by - M = w×1000/m×V Here, M = Molarity of Salt,…

Q: What mass (in grams) of potassium acetate, KC2H302, must be added to 145 ml of 0.010 M acetic acid…

A: Given  PH = 4.67  Ka  = 1.8 × 10-5 Molarity of acetic acid = 0.010 M Mass of potassium Acetate = ?

Q: A buffer solution that is 0.397 M in HCN and 0.397 M in KCN has a pH of 9.40. The addition of 0.01…

A: Given that, We have a buffer solution containing 0.397 (M) HCN and 0.397 (M) KCN. The buffer…

Q: Calculate the pH of a buffer that contains 0.390 M hydrazine, N2H4 (Kb = 1.3 × 10−6), with 0.264 M…

A: The H+ concentration of hydrogen ions that the given solution consists of determines the basic or…

Q: A 1.43 L buffer solution consists of 0.179 M butanoic acid and 0.300 M sodium butanoate. Calculate…

A: The pH of an acidic buffer can be calculated by using Henderson equation pH = pka + log10…

Q: What is the pH of a buffer system that is 0.25 M in NH3 and 0.26 M in NHẠCI? Kb NH3 = 1.8 x 105

A: To determine pH of buffer solution Henderson- Hasselbalch equation can be used. Given solution is…

Q: A buffer with a pH of 4.31 contains 0.31 M of Sodium Oxalate Na2C2O4 and 0.24 M of Oxalic acid…

A: Value of pH is used to measure acidity or basicity of a solution. At room temperature, pH value lies…

Q: What mass of ammonium chloride should be added to 2.60 L of a 0.145 M NH3 to obtain a buffer with a…

A: Given that:            Molarity of ammonia = 0.145 M             Volume of ammonia = 2.6 L…

Q: How many grams of solid calcium cyanide, Ca(CN)₂ must be added to 200.0 ml of 0.370M hydrocyanic…

A: Molarity of HCN = 0.370 M pH = 9.20

Q: Calculate the pH of a buffer composed of 0.322 M acetic acid and 0.381 M potassium acetate. K, =…

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Q: What mass of A chemistry graduate student is given 125. mL of a 1.30 M acetic acid (HCH,CO,)…

A: Handerson Hasselbalch equation –  Buffer solution is mixture of weak acid and its conjugate base.…

Q: A 1.47 L buffer solution consists of 0.173 M butanoic acid and 0.299 M sodium butanoate. Calculate…

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Q: Consider a buffer made by adding 42.3 g of (CH3)2NH2I to 250.0 mL of 1.42 M (CH:)»NH (Kb = 5.4 x 10…

A: pH is a scale which is used to determine the acidity or basicity of a solution. pH = pKa + log…

Q: 24. How many moles of NH,Br must be added to 2 L of 0.1 M NH,OH to form a buffer whose pH is 9.00?…

A: pOH = 14 - pH = 14 - 9.00 = 5.00   Let y moles of NH4Br is added. Moles of NH4OH = M x V = 0.1 x 2 =…

Q: How many grams of solid sodium fluoride should be added to 0.500 L of a 9.49x10-2 M hydrofluoric…

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Q: How many grams of NH4CI would have to be added to 250.0 mL of a 0.420 M NH3 solution to prepare a…

A: The minimum concentration of NH4Cl that must be present in the solution to have a pH of 10 is;…

Acid Base Titration

An acid-base titration is the method of quantitative analysis for determining the concentration of an acid and base by exactly neutralizing it with a standard solution of base or acid having known concentration.