How many grams of (CH3)2NH2CI must be added to 1.00 L of 0.200 M (CH3)2 NH to produce a buffer with pH = 10.65? Assume no change in volume. pKb of (CH3)2 NH = 3.27 molar mass (CH3)2NH2CI = 81.6 g/mol 6.91 g O 0.11 g 19.6 g 0.34 g O 24.0 g O 0.22 g

Q: 4. (a) A laboratory technician dissolved 6.797 g of compound W (a non-electrolyte) in 15.00 mL of…

A: Please find the attachment.

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: A 50.0 mL sample of 0.100 M NH, is titrated with 0.100 M HBr. What is the most likely pH of the…

A: Answer :- 2.041  pH = 2.041…

Q: A solution is prepared by dissolving 1.50 g of NaOH in enough water to make 1.250 L of solution.…

A: Since you have asked multiple question, we will solve the first question for you.If you want any…

Q: a. Calculate the pH of a mixture of 0.25 M acetic acid and 0.1 M sodium acetate. b. What happens to…

A: pH is negative logarithm of Hydrogen ion concentration  expressed in mole/litre

Q: What mass (in grams) of sodium acetate (CH3COONa) must be added to  100.00 mL  of a 0.115 M solution…

A: Mass (in grams) of sodium acetate (CH3COONa) must be added to  100.00 mL of a 0.115 M solution of…

Q: A student is conducting molecular weight determination of an unknown diprotic acid. He first…

A:

Q: A buffer solution contains 0.275 M of acetic acid, HC2 H 3 O 2 , and 0.350 M of its conjugate salt,…

A: Given : Concentration of HC2H3O2 = 0.275 M Concentration of KC2H3O2 = 0.350 M

Q: 8. What is the pH in the preceding problem if the mixture consists of 0.1 M acetic acid and 0.25 M…

A: The acidity of a solution is expressed in pH scale and is furnished in terms of hydrogen ion…

Q: given the reagent potassium phosphate tribasic trihydrate (K3PO4*3H2O) and 1.1M HCl and 1.1 M NaOH.…

A:

Q: [20] ml of [4] M HC2H3O2 is titrated with 2.25 M sodium hydroxide. Ka for HC2H3O2 is 1.8 x 10-5 a.…

A: Since you have posted questions with multiple sub-parts, we are entitled to answer the first 3 only.…

Q: A 0.3654 g portion of pure formic acid (CH2O2, FW=46.03 g/mol, Ka=1.77 x 10-4) is dissolved in 50.00…

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Q: A student is conducting molecular weight determination of an unknown diprotic acid. He first…

A: 0.5830 g of KHP 204.22 g/mol consumes 24.02 mL of NaOH titrant.0.2108 g of unknown diprotic acid…

Q: A student is conducting molecular weight determination of an unknown diprotic acid. He first…

A: Given that -  Total volume of NaOH = 250 mL  Volume of NaOH used by KHP = 24.02 mL  Mass of KHP =…

Q: Scenes A to D represent tiny portions of 0.10 M aqueous so-lutions of a weak acid HA (red and blue;…

A: a) A buffer is a solution that contains a weak acid (HA)and its conjugate base (A-). This is…

Q: Consider a buffer solution that contains 0.55 M NH2CH2CO2H and 0.35 M NH2CH2CO2Na.…

A: a. mol of acid = MV = 0.35*0.25 = 0.0875   mol of conjguate = MV = = 0.55*0.25 = 0.1375   after…

Q: A laboratory technician dissolved 6.797 g of compound W (a non-electrolyte) in 15.00 mL of ethylene…

A: The elevation in boiling point on addition of non-electrolyte to a pure liquid is a colligative…

Q: A buffer is prepared by mixing 35.2 mL of 0.183  M NaOH with 141.2  mL of 0.231 M acetic acid. What…

A: Given: Concentration of acetic acid = 0.231 M Volume of acetic acid solution = 141.2 mL = 0.1412 L…

Q: A solution is made by dissolving 0.1283 g of the acid form of the buffer TRIS (molecular mass =…

A: According to the mole concept, in terms of mass, the amount of substance in moles is equal to the…

Q: 9. A buffer solution is made of 6.1 g of benzoic acid (C6H5COOH) and 0.60 g of sodium benzoate…

A: First calculate the conc of each . Then applying Henderson equation we can calculate the pH.  The…

Q: A buffer consists of 0.21 M H3PO4 and 0.38 M NaH2PO4. Given that the K values for H3PO4 are, Ka1 =…

A: Given that, a buffer is made by 0.21 M of H3PO4 and 0.38 M of NaH2PO4. The dissociation constant…

Q: Calculate the equivalent weight of Na2CO3 when it is titrated against HCl in presence of…

A: The Answer to the following question is- a) reaction Na2CO3 + HCl ⇔NaHCO3 + NaCl  Molar mass of…

Q: The titration curve of a weak acid, HnA has 3 inflection points at pH = 3.5, 6.7 and 10.3. If 0.1 M…

A:

Q: What will be the pH of a buffer prepared from 5.3 g of NH4Cl and 35 mLs of 1 M NaOH, diluted to a…

A: Buffer is a solution that resists the change in pH when small amount of acid or base is added to it.…

Q: Calculate the pH of the solution that results from the addition of 0.040 moles of HNO3 to a buffer…

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

Q: A 25.4mL sample of 0.156 M HCl is titrated with 0.249 M NaOH. Calculate the pH after the addition of…

A:

Q: How many grams of (CH3)2NH2Cl must be added to 1.00 L of 0.200 M (CH3)2 NH to produce a buffer with…

A: Given : Concentration of (CH3)2NH = 0.200 M Volume of buffer solution = 1.00 L pH of buffer = 10.65…

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: The pH of a buffer prepared by adding 0.708 mol of the weak acid HA to 0.305 mol of Na in 2.00 L of…

A: Given,  The pH of a buffer prepared by adding 0.708 mol of the weak acid HA to 0.305 mol of NaA in…

Q: What volume of 1.35 M HCl must be added to 0.283 L of 0.323 M dimethylamine to produce a buffer with…

A:

Q: The primary buffer in the blood is carbonate-bicarbonate buffer. If the pKa is 6.1 and the pH is set…

A: GIVEN DATA:-Buffer is Carbonate (CO32-) and Bicarbonate (HCO3-).                          pH=7.4…

Q: A 65.0 mL solution of 0.158 M potassium alaninate ( H, NC, H, CO, K) is titrated with 0.158 M HCI.…

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Q: Calculate the pH for the titration of 50.00 mL of 0.0500 M NaCN with 0.1000 M HCl after addition of…

A: Given: CN⁻ + H₃O⁺ -> HCN + H₂O  The objective is to calculate the pH for titration of 50.00mL of…

Q: What is the pH of a buffer prepared by adding 0.708 mol of the weak acid HA to 0.305 mol of Na in…

A: Solution -

Q: 2)How many grams of solid ammonium chloride should be added to 2.00 L of a 0.203 M ammonia solution…

A:

Q: A solution of oxalic acid dihydrate (H₂C₂O₄･2H₂O) with a known concentration of 0.400 M H₂C₂O₄･2H₂O…

A: At equivalent point mole to stoichiometry is equal of both reactants

Q: What is the pH of a buffer that contains 0.250 mol of CH3NH2 and 0.450 mole of CH3NH3CI? Kb for…

A:

Q: NaF solution added drop wise to 0.0144 M solution in Ba? What is the lowest concentration of F…

A: Hi, since you have posted multiple questions, we will answer the very first question for you. Kindly…

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: 20.00 mL of 0.250 M propanoic acid, C3H7COOH, is titrated with 0.125 M NaOH. Calculate the pH for…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: A student is conducting molecular weight determination of an unknown diprotic acid. He first…

A: Solutions            Hence option (E) is correct answer 0.1419M

Q: given the reagent potassium phosphate tribasic trihydrate (K3PO4*3H2O) and 1.1M HCl and 1.1 M NaOH.…

A:

Q: A phenol/phenolate buffer was made up by mixing 0.0125 mol of phenol (C6H5OH) and 0.0135 m of…

A: Given : Moles of phenol = 0.0125 mol Moles of phenolate = 0.0135 mol Volume of buffer = 500 mL = 500…

Q: A buffer is made up of 239mL of 0.187 M potassium hydrogen tartrate (K2HC4H4O6) and 137mL of 0.288 M…

A: A buffer solution resists changes in pH. pH <7 has an acidic buffer solution; pH>7 has a basic…

Q: What mass (in g) of ammonium chloride (NH4Cl) should be added to 2.60 L of a 0.155 M NH3 to obtain a…

A: Buffer solution is made of weak acid or base and their corresponding conjugate base or acid…

Q: What is the pH of the buffer that results when 32 g sodium acetate (NaCH3CO2) is mixed with 500.0 mL…

A: Calculate the number of moles of sodium acetate. The molar mass of sodium acetate is 82 g/mol.

Q: What will be the pH change when 20.0 mL of 0.100 M NaOH is added to 80.0 mL of a buffer solution…

A: According to the mole concept, in terms of mass, the amount of substance in moles is equal to the…

Q: Consider a buffer made by adding 132.8 g of NaC₇H₅O₂ to 300.0 mL of 2.35 M HC₇H₅O₂ (Ka = 6.3 x 10⁻⁵)…

A: The question is based on the concept of buffer solution.   A buffer is a solution which resist any…

Q: When Fe(OH)3 is added to 1.0 M HSCN, the following reaction occurs. Given that the pKa of HSCN is…

A: The ferric ion is orange in colour and  HSCN is colourless and on reaction gives a dark red solution…

Q: What is the molar solubility of Pb(OH)2 (Ksp = 2.8 x 10−16) in a buffer solution containing the same…

A:

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.