A solution of hydrocyanic acid is prepared by dissolving 0.10 mol HCN in enough water to make 1.0 L of solution. If 0.0050 mol of NaCN is added to the solution with no increase in volume, what is the concentration of H+ when equilibrium is re-established? The pH of the solution is 5.2 before adding 0.005 mol NaCN. (Hint: Use concentrations to get equilibrium constant. Account for the added CN- ions. Treat Na+ is a spectator ion) *final answer in 4 decimals

Q: At 22 °C, an excess amount of a generic metal hydroxide, M(OH),, is mixed with pure water. The…

A: The balanced reaction is, M(OH)2 → M+2 + 2OH-Ksp=M2+OH-2   The pOH is, pOH = 14 - 10.38 = 3.62   So,…

Q: 250.0 M acetic acid and 0.250 M in sodium acetate. What is the initial pH of this solution? What is…

A: Step 1: As volume of  buffer solution =250mL=0.250Linitial conc. of  acetic acid  =0.250MSo ,…

Q: At 22 °C, an excess amount of a generic metal hydroxide, M(OH),, is mixed with pure water. The…

A: In order to find Ksp of the salt we first write down the given data: pH= 10.34. The given salt is…

Q: 6. At 25.0°C, 65.0 mL of 0.784 M ascorbic acid, HC6H7O6 was mixed with 45.0 mL of 0.371 M KOH. Ka =…

A: We have calculate pH of the given solution

Q: One student, when experiencing a headache, decided to ingest a solution of acetylsalicylic acid…

A: Given , Concentration of acetylsalicylic, [C9H8O4]  = 0.1mol/L Ka = 5.6 x 10-4

Q: How many g of sodium formate should be added to 250 ml of 0.2 M hydrochloric acid solution to obtain…

A: Given,  Volume of HCl = 250 mL  Molarity of HCl = 0.2 M  pH = 4.3  Mass of sodium formate in g = ?

Q: A buffer solution contains 0.377 M hydrofluoric acid and 0.341 M sodium fluoride. If 0.0347 moles of…

A:

Q: Explain how a buffer solution of carbonic acid and bicarbonate will react when: a strong acid,…

A: pH of a buffer solution remain unchanged with addition of few drops of acid and base.

Q: The carbonic acid/bicarbonate buffer is important in maintaining the proper pH of human blood. H₂CO,…

A: Given :Carbonic acid is important in maintaining the proper pH of human blood.Reaction : Objective :…

Q: An analytical chemist is titrating 1/8.6 mL of a 0.7500M solution of ammonia (NH3) with a 0.4800M…

A: Given -> Volume of NH3 = 178.6 ml Molarity of NH3 = 0.7500 M Volume of HNO3 = 142.1 ml Molarity…

Q: 2. In the following reaction at equilibrium: 2CrO, (aq, yellow) + 2 H30* (aq) Cr202 (aq, orange) + 3…

A:

Q: Determine the Ka for an acid by constructing an ICE table and using this information to construct…

A:

Q: You make a solution by dissolving 0.0010 mol of HCl in enough water to make 1.0 L of…

A: The molarity of a solution is defined as the number moles of solute per liter of solution. In the…

Q: equation: HCO3 (aq) CO2(g) + OH- (aq) we have saturated sodium bicarbonate with HCl, which is a…

A: Answer is explained below. Bromothymol blue is a pH indicator it shows acid and bases by changing…

Q: A 25.00 mL sample of 0.260 M KOH is titrated with 0.750M HCl at 25 °C. Calculate the initial pH…

A:

Q: 0.030 moles of a weak acid, HA, was dissolved in 2.0 L of water to form a solution. At equilibrium,…

A:

Q: 10.00 mL of 0.45 M NaOH is added to 9.00 mL of 1.00 M HCOOH. What is the molar concentration of…

A:

Q: Consider the dissociation of hydrocyanic acid in aqueous solution HCN - CN + H* for which K, is 4.9…

A:

Q: The acid-dissociation constant for benzoic acid (C6H5COOH) is 6.3×10−5. Part A Calculate the…

A:

Q: At 22 °C, an excess amount of a generic metal hydroxide, M(OH),, is mixed with pure water. The…

A: Given ph is more than 7  Convert in poH term.

Q: Weak Bases dissociate according to the following equation: A- (aq) + H2O(L)  ⇌ OH- (aq) + A-(aq)…

A:

Q: Which of the reactions are exothermic? 2 Mg(s) + 0,(g) 2 MgO(s) AH = -1203 kJ/mol O NH, (g) + HCI(g)…

A:

Q: t 22 °C, an excess amount of a generic metal hydroxide, M(OH),, is mixed with pure water. The…

A:

Q: a 0.342 M solution of H2NNH2 is allowed to come at equilibrium. at equilibrium the ph is measured to…

A:

Q: Calculate the pH of a buffer solution prepared by dissolving 0,48 mole of sodium fluoride (NaF) and…

A: Buffer solution is a type of solution which resist the pH change when small amount of acid or base…

Q: Consider an aqueous solution of acetic acid: CH3COOH (aq)   H2O (l) CH3COO (aq)   H2O  (aq). If…

A: acetic acid is a weak acid and it undergoes partial dissociationto give acetate and H+ ions. The…

Q: At 22 °C, an excess amount of a generic metal hydroxide, M(OH)2, is mixed with pure water. The…

A:

Q: Boric acid, BOH is used as a mild antiseptic. What is the pH of a 0.025 aqueous solution of boric…

A: Set up the equilibrium table for the given acid solution Let x be the unknown concentration…

Q: Using the formula below, calculate the percent ionization of 0.01 M hexanoic acid, which contains…

A:

Q: The value of Ka for acetylsalicylic acid (aspirin) , HC9H¬O4 , is 3.00×104. Write the equation for…

A:

Q: An analytical chemist is titrating 233.8 mL of a 0.9100M solution of hydrazoic acid (HN3) with a…

A:

Q: Determine the direction to which the equilibrium will shift if the following changes occur (forward…

A: LeChatelier's principle: When factors like concentration, pressure, temperature, inert gases that…

Q: An analytical chemist is titrating 143.6 mL of a 0.7000M solution of piperidine (C5H10NH) with a…

A: Given, Volume of piperidne C5H10NH=143.6 mLMolarity of  piperidne C5H10NH=0.7000mPK6 =2.89Volume of…

Q: What is the pH change when 28.8 mL of 0.0540 M NaOH is added to 70.1 mL of a buffer solution…

A:

Q: What are the concentrations of each species in the reaction when you reach equilibrium of a 0.15 M…

A: Given :- Initial concentration of HCN = 0.15 M  Kc = 4.9 × 10-10  To calculate :- equilibrium…

Q: 1. The ionization constant (Kb) of pyridine (C5H5N) is 5.62 x 10–4. If 11.3 grams of sample of…

A:

Q: Calculate the pH of the following solution: 2.8 x 10-4 M Ba(OH)2 (b) What is the original molarity…

A: Hi, as you have posted multiple questions and have not mentioned which question you want us to solve…

Q: solution NaOH(aq)NaOH(aq) contains 6.96.9 g NaOH(s)NaOH(s) per 100.0100.0 mL of solution. Calculate…

A: Given that: Mass of NaOH(s) = 6.9 g Volume of solution = 100.0 mL = 0.1 L pH of the solution = ? pOH…

Q: In the following equilibrium, when Fe *3 ion is added, the concentration of Fe(SCN) +2 ion will Fe…

A: 2) At equilibrium,the reaction is as follows-       Fe3+ + SCN- ⇌ Fe(SCN)2+ Then, rate constant…

Q: A buffer solution contains 0.405 M NAHSO3 and 0.332 M Na,SO3. If 0.0248 moles of potassium hydroxide…

A: Given data, Molarity of NaHSO3 =0.405M Molarity of Na2SO3 = 0.332M Volume of buffer = 150mL = 0.150L…

Q: Potassium formate has been studied as a potential environmentally friendly deicing salt for use on…

A: Given,  Molarity of potassium formate ( HCO2K) = 0.65 M Ka of HCO2H = 1.8 x 10-4

Q: What is the pH of a buffer solution that is 0.602 M in hydrofluoric acid and is 0.455 M is potassium…

A:

Q: An analytical chemist is titrating 166.5 mL of a 0.6300M solution of hydrazoic acid (HN3) with a…

A:

Q: What is the pH of a buffer solution containing of 0.50 moles of HCl and 0.25 moles of NaCl? Given…

A: The given data contains, moles of HCl = 0.50 moles. moles of NaCl = 0.25 moles. Ka of HCl = 6.8×10-4…