Acid-base titration questions. Please help! Thanks.
Homework Answers
2)
At first equivalence H3PO4 + NaOH -----> NaH2PO4 + H2O is the
balanced equation .
Thus
meq of acid = meq of base
20x M = 15.5x0.2
Thus
molarity of acid = 0.155 M
3)At first equivalence H3PO4 + NaOH -----> NaH2PO4 + H2O is
the balanced equation .
Thus
meq of acid = meq of base
25x M = 18.27x0.01
Thus
molarity of acid = 0.00738M
Add Answer to:
Acid-base titration questions. Please help! Thanks.
2. Given that 20.00 mL of phosphoric acid solution required...
I'm having trouble with these questions from the lab: polyprotic acids: titration of phosphoric acid and...
I'm having trouble with these questions from the lab: polyprotic acids: titration of phosphoric acid and determination of the molar concentration of phosphoric acid in cola. 3.A student titrated 25.00 mL of cola and it required 18.27 mL of 0.0100 M NaOH to reach the 1st equivalence point. Calculate the molar concentration of phosphoric acid in this brand of cola. 4. If the density of the "Cola" drink is 1.00 g/mL. What is the mass percent of phosphoric acid in...
Titration of 25.00 mL of an unknown diprotic acid solution required 15.09 mL of 0.10 M...
Titration of 25.00 mL of an unknown diprotic acid solution required 15.09 mL of 0.10 M NaOH to reach the first equivalence point and 29.82 mL of 0.10 M NaOH to reach the second equivalence point. What is the concentration of the diprotic acid solution?
5.00 mL of a solution containing a monoprotic acid was placed in a 100-mL volumetric flask,...
5.00 mL of a solution containing a monoprotic acid was placed in a 100-mL volumetric flask, diluted to the mark with deionized water and mixed well. Then, 25.00 mL of this diluted acid solution was titrated with 0.08765 M NaOH. 9.23 mL of NaOH was required to reach the endpoint. a. What does the term monoprotic mean? b. Determine the molar ratio between the acid and NaOH. c. Calculate the moles of NaOH used in this titration. d. Calculate the...
1.) 20.00 mL of 0.11 M benzoic acid (C6H5COOH, Ka = 6.3x10-5) is titrated with 0.25...
1.) 20.00 mL of 0.11 M benzoic acid (C6H5COOH, Ka = 6.3x10-5) is titrated with 0.25 M NaOH. What volume of base is required to reach the equivalence point in the titration? 2.) Calculate pH at each of the following points in the titration. a) 4.00 mL b) 8.80 mL
PRE LAB : Volumetric Titrations. (Acid-Base Titrations) Name: ID Date 1. How many mL of a...
PRE LAB : Volumetric Titrations. (Acid-Base Titrations) Name: ID Date 1. How many mL of a 0.103M NaOH solution are required to neutralize 10.00mL of a 0.198M HCI solution? 2. what is the difference between end point and equivalence point? 3. A titration is performed and 20.70 mL of 0.500M KOH is required to reach the end point when titrated against 15.00 mL of H2SO4 of unknown concentration. Write the chemical equation and solve for the molarity of the acid....
A 15 ml aliquot of 1.00 M phosphoric acid is titrated with sodium hydroxide using phenolphthalein...
A 15 ml aliquot of 1.00 M phosphoric acid is titrated with sodium hydroxide using phenolphthalein as an indicator. If it takes 20.00 ml of sodium hydroxide to reach the endpoint, what is the molarity of the sodium hydroxide? Answer with appropriate significant digits. H3PO4 (aq) + NaOH (aq) --> H2O (l) + Na3PO4
The next 9 questions are related to the titration of 20.00 mL of a 0.0700 M...
The next 9 questions are related to the titration of 20.00 mL of a 0.0700 M acetic acid solution with 0.0950 M KOH. What is the initial pH of the analyte solution? What volume of KOH is required to reach the equivalence point of the titration (in mL)? How many mmol of the salt are present at the equivalence point? (ANALYTICAL AMOUNT, NOT EQUILIBRIUM AMOUNT) What is the volume of the solution at the equivalence point (in mL)? What is...
3) A weak monoprotic acid has a pKa 6.15. 50.00 mL of an 0.1250M aqueous solution...
3) A weak monoprotic acid has a pKa 6.15. 50.00 mL of an 0.1250M aqueous solution of this weak acid is titrated with 0.1000M NaOH. a) What is the equivalence point volume and 2 equivalence point volume for this titration? Find the pH b) before the titration begins; c) after 20.00 mL of the NAOH has been added, d) after 62.50 mL of the NaOH has been added; and e) after 85.00 mL of the NAOH has been added. 4)...
help please and thanks 4. A group of students conducted a titration of 25.00-ml saturated Ca(OH)2...
help please and thanks
4. A group of students conducted a titration of 25.00-ml saturated Ca(OH)2 solution with 0.0480M HCI. The students found that 10.10-mL of acid was required to reach the equivalence point. Calculate the molar concentration of OH and Ca, the molar solubility, and K. of the analyte. Show detailed calculation for each Detailed Method of Calculation (OH) in the analyte: Ca?) in the analyte: molar solubility of Ca(OH)2: Ksp of Ca(OH)2:
Titration of a Weak Base Prelaboratory Questions 1. Will addition of HCl to a solution make...
Titration of a Weak Base Prelaboratory Questions 1. Will addition of HCl to a solution make it more acidic or more basic? Will the pH increase or decrease? How does an end point differ from an equivalence point? 2. were titrated with a standard HCl solution: 3. Aliquots of an unknown tris sample Use the balanced equation to set up the string calculation showing how the tris a. mol of acid, L of acid. mo of base, and L of...
PRE LAB : Volumetric Titrations. (Acid-Base Titrations) Name: ID Date 1. How many mL of a 0.103M NaOH solution are required to neutralize 10.00mL of a 0.198M HCI solution? 2. what is the difference between end point and equivalence point? 3. A titration is performed and 20.70 mL of 0.500M KOH is required to reach the end point when titrated against 15.00 mL of H2SO4 of unknown concentration. Write the chemical equation and solve for the molarity of the acid....
3) A weak monoprotic acid has a pKa 6.15. 50.00 mL of an 0.1250M aqueous solution of this weak acid is titrated with 0.1000M NaOH. a) What is the equivalence point volume and 2 equivalence point volume for this titration? Find the pH b) before the titration begins; c) after 20.00 mL of the NAOH has been added, d) after 62.50 mL of the NaOH has been added; and e) after 85.00 mL of the NAOH has been added. 4)...
help please and thanks
4. A group of students conducted a titration of 25.00-ml saturated Ca(OH)2 solution with 0.0480M HCI. The students found that 10.10-mL of acid was required to reach the equivalence point. Calculate the molar concentration of OH and Ca, the molar solubility, and K. of the analyte. Show detailed calculation for each Detailed Method of Calculation (OH) in the analyte: Ca?) in the analyte: molar solubility of Ca(OH)2: Ksp of Ca(OH)2:
Titration of a Weak Base Prelaboratory Questions 1. Will addition of HCl to a solution make it more acidic or more basic? Will the pH increase or decrease? How does an end point differ from an equivalence point? 2. were titrated with a standard HCl solution: 3. Aliquots of an unknown tris sample Use the balanced equation to set up the string calculation showing how the tris a. mol of acid, L of acid. mo of base, and L of...
Most questions answered within 3 hours.
-
Principles of Programming midterm study guide help!
1.)
______ Which of the following would reference the...
asked 12 minutes ago -
Romeo wishes to throw a bouquet of flowers to Juliet, who is on
a second-story balcony,...
asked 27 minutes ago -
Why is QE a controversial monetary policy tool.
A. It may lead to excessive inflation.B. By...
asked 43 minutes ago -
A finite potential well has depth U0 = 2.78 eV . What is the
penetration distance...
asked 1 hour ago -
1. The bus bars of a power station are in two sections A and B
separated...
asked 1 hour ago -
Fiscal policy is the deliberate manipulation of taxes and
government spending to alter GDP, employment, inflation...
asked 2 hours ago -
evaluating an expression using only one digit and + and - as
operators ....3+5-1+7-5+8
-----------------------
stack...
asked 2 hours ago -
Two concentric current loops lie in the same plane. The smaller
loop has a radius of...
asked 2 hours ago -
1)Which of the following is an
important difference between qualified and nonqualified retirement
plans?
a. Qualified...
asked 2 hours ago -
What's the streaming business's problem on the
horizon?
asked 3 hours ago -
I need help with writing the conclusion for this online lab
report
Abstract
By testing the...
asked 3 hours ago -
For the reaction 1N2+3H2-----> 2NH3, would the reaction rate
trend be: delta[NH3]/ delta t = -2...
asked 4 hours ago