How would you prepare 1 L of a 0.050 M phosphatebuffer at pH 7.5 using crystalline K2HPO4 and a solution of 1.0 M HCl?

Q: Write down the reaction between [Cr(C2O4)2(H2O)2] and dilute potassium hydroxide.

A: The given compound must be [Cr(C2O4)2(H2O)2]- instead of [Cr(C2O4)2(H2O)2]. [Cr(C2O4)2(H2O)2]-…

Q: Doc Jill wants to determine the Ao of a weak acid she isolated called Yurdaughteric acid (HYd). She…

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

Q: What is the pOH of a .17 M solution of pyridime (Kb= 1.4 x 10-9) at 25•C?

A: the reaction taking place will be  pyridime + H2O ----> Pyridime ion + OH-                   Kb =…

Q: How many moles of NaOH would be needed to react completely with 65.0 mL of a 2.50 M solution of…

A: The balanced neutralisation reaction is as follow 2NaOH + H2C2O4 -----> Na2C2O4  + 2 H2O Hence…

Q: What is the pH of a solution of 0.300 M HNO₂ containing 0.200 M NaNO₂? (Ka of HNO₂ is 4.5 × 10⁻⁴)

A: By using Henderson Hasselbalch equation the pH of the buffer solution is determined by using the…

Q: how many grams of phosphoric acid (H3PO4) are needed to prepare 25.0 m of an acid solution that is…

A: Molality of acid required = 25m The given normality of solution is 0.2N Molar mass of H3PO4 is…

Q: How many moles of S2O3^2- Are needed to titrate a green river water sample containing 0.50 moles of…

A: We will use stoichiometry of the reaction to get the answer

Q: Which of the following salts would you predict to also produce bubbles in a chemical reaction…

A: Chemical reaction is a process in which one or more reactants when combine with each other in order…

Q: 1) A soda- Lime Sample is g0% NaoH and 10% CaO · If 3gm is dissolved in 250 ml, what is the tutal…

A: Given: mass of mixture = 3 gram  Volume of solution = 250 ml To find : Normality of solution and…

Q: Why is H3O=[OH- ]=1.0 x 10-2 M not feasible in water? What would happen if we tried to make such a…

A: Since the water has an equilibrium with H3O+ and OH- ions as per the reaction  2 H2O (l)…

Q: What is the percent ionization at 25 °C for a 0.00675 M solution of codeine (CH2, NO)? O 18.7% O…

A:

Q: calculate the morality of 2.75 L of solution containing 1.35*10^-2 mol HCl

A: Given :  Number of moles of HCl = 1.35 × 10-2 mol  Volume of solution = 2.75 L  To be calculated :…

Q: Calculate the HS¯ concentration of an anoxic, hypolimnetic river water sample which has a pe value…

A:

Q: Fill in the left side of this equilibrium constant equation for the reaction of benzoic acid…

A: The Equilibrium constant for a reaction   A + B ⇔ C + D   Can be written as  K = [C][D][A][B],…

Q: Q5/ What volume of 0.20M Ca(OH)2 will neutralize 45.0 mL of a 1M solution of HCIO;?

A: Given: 0.20 M Ca(OH)2 45.0 mL of 1M HClO3

Q: What is the pOH of a 0.053 M solution of KOH at 25 °C? 1.28 12.72 13.11 0.89

A: We have given for KOH solution.  Concentration of KOH solution = 0.053 M  KOH will dissociates as;…

Q: If 20.00 mL (0.0200 L) of the oxalic acid solution prepared in question 6 is used to titrate a NaOH…

A:

Q: 2. Calculate Ka for Aspirin solution (350 ml containing 1.26 g) with pH 2.6. The molecular formula…

A: Given data, Mass of aspirin=1.26gVolume=350mL=0.350LpH=2.6Molecular mass of aspirin=180g/mol

Q: calculate the weight of NaOH quired to prepared solution O.1M in ?250ml,Na=23,0=16,H=D1

A: 0.1M means 0.1 moles in 1000 ml solution no of moles in 250 ml =  0.1/4 =0.025 moles weight of NaOH…

Q: How many milliliters of dry CO2, measured at STP, could be evolved in the reaction between 32.8 mL…

A:

Q: What is the pH of a solution of 0.300 M HNO₂ containing 0.140 M NaNO₂? (Ka of HNO₂ is 4.5 × 10⁻⁴)

A: Given : Concentration of HNO2 = 0.300 M Concentration of NaNO2 = 0.140 M And Ka of HNO2 = 4.5 X 10-4…

Q: Why is [ H30]=[OH-]=1.0× ^ -2 not feasible in water? What would happen if we tried to make such a…

A: Pure water dissociates to give an equal concentration of H3O+ and OH- ions. Following the below…

Q: What the pH of a solution containing [H3O+] = 5.62 x 10-11 mol L-1 ?

A: Given that, for a solution [H3O+] = 5.62×10-11 mol/L. We have to calculate the pH of the solution.

Q: Describe how to prepare 0.250 L of 0.050 0 M HEPES, pH 7.45.

A: HEPES is an acid that contains pKa of 7.56. Acidic solution could be obtained when it is dissolved…

Q: How many milliliters of dry CO2, measured at STP, could be evolved in the reaction between 24.8 mL…

A: Given;

Q: The difference in the concentration of hydronium ions in a solution of pH 2.0 compared with one of…

A: We know that : pH = -log[H3O^+]  [H3O^+] = concentration of hydronium ion.  For pH = 2 :  2 =…

Q: Calculate the concentration of free Ca²⁺ in a solution of 0.10 M CaY²⁻ at pH 10.00. (K= 5.0 × 10¹⁰)

A:

Q: A 1.0 x 10-2 M aqueous solution of Ca(OH)2 at 25.0 °C has a pOH of O 12.30 1.70 O 2.00 O 7.00 12.00

A: pOH of Ca(OH)2 can be calculated as follows

Q: What is the concentration of sodium ions in 0.300 M NaNO₃?

A: Given Information: Concentration of NaNO3 =0.300 M To find: Concentration of sodium (Na+) ions

Q: 7. At 25 °C, 0.0010 M NH4OH has a conductivity of 3.40 x 10-³ Sm¹¹. Given (in Sm²mol-¹): A, (NH4CI)…

A: In this we would use dissociation equation of NH4OH to calculate Kb.

Q: Why is [ H3O]=[OH-]=1.0× ^ -2 not feasible in water? What would happen if we tried to make such a…

A: Since the water has an equilibrium with H3O+ and OH- ions as per the reaction  2 H2O (l)…

Q: What is the percent ioniation of 0.0550 M solution of HC2H202?

A: Strategy: Write the ionization equation and the expression for Ka. Next, find the concentration of…

Q: You have a solution of KI that is 0.480 M. How would you prepare 5.00 L of a solution that is 1.50x…

A: Given:Molarity of KI =  0.480 M (M1)Volume of required solution = 5.00 L (V2)Conc. Of required…

Q: A. Calculate the PH of the (0. 1 N) NasPOa in 250 ml B. What is the Normality of a sulfuric acid…

A: (A) pH of 0.1N Na3PO4 solution: C = 0.1/3 = 0.033M PO43- ions are undergoing hydrolysis and pH is…

Q: The Ka value for hypochlorous acid (HClO) is 3x10-8 at 25 ºC. What is the ionization percentage of…

A: The concentration of hydrogen ions released by HClO at equilibrium can e determined as follows: H+ =…

Q: What is the percent ionization at 25 °C for a 0.00675M solution of codeine (CH2,NO)? O 18.7% O 1.54%…

A: Codeine is a weak base , to calculate its percent ionization we would first calculate draw an ICE…

Q: What is the pH of a solution of 0.300 M HNO₂ containing 0.150 M NaNO₂? (Ka of HNO₂ is 4.5 × 10⁻⁴)

A: In this question, we will calculate the pH of this solution ( this is a buffer solution ). For…

Q: What is the pH of a 0.64 M solution of NH3 (Kb = 1.2 × 10-5)?

A:

Q: What is the pH of a 0.379 M solutiôn of roxyla a. 0.42 b. 5.96 с. 3.19 O d. 6.38 O e. 4.2 x 10-7

A: Given, Molarity = 0.379 M Ka = 1.1 x 10-6  PH= ?

Q: Determine [H30*] of a 0.250 M solution of formic acid (Ka 1.8 x 10-4).

A:

Q: Assuming full dissociation in water, what concentration of the following ionic compounds would have…

A:

Q: What is the mole ratio of sodium acetate to acetic acid in abuffer with a pH of 5.75?

A:

Q: Which species are present in aqueous solution of 0.12 M NH3 solution except for H20?

A: In aqueous solution, ammonia basically acts as a base. It gains hydrogen ions from H2O that produces…

Q: Why is [ H3O] = [OH] = 1.0× 10-2M not feasible in water? What would happen if we tried to make such…

A: Since the water has an equilibrium with H3O+ and OH- ions as per the reaction  2 H2O (l)…

Q: What is the pH of a solution that has a [H3O+] of 7.2 x 10-3?  please show work to help me better…

A:

Q: Why is [H3O] =[OH- ]=1.0 x 10-2 M not feasible in water? What would happen if we tried to make such…

A: Since the water has an equilibrium with H3O+ and OH- ions as per the reaction  Hence the…

Q: Show the calculations to demonstrate that 2% AgNO3 is approximately 0.1M in Ag+ ions.

A: Given:the given concentration of AgNO3 must be in w/vconcentration of AgNo3 (w/v)=2%The formula for…

Q: What is [H*] in a 0.270 M solution of acrylic acid, CH2CHCOOH (Ka = 3.16 x 10-5)?

A: Using the equilibrium concept  We can calculate the H+ concentration

Q: 2. Calculate the number of grams of oxalic acid dihydrate (M.W. = 126.1) necessary to react with 35…

A:

Environmental Pollution

Environmental pollution occurs due to some unwanted alteration in the surroundings which results in unfavorable effects on all organisms of that surrounding.