A chemist had a bottle of HCl (aq) of unknown concentration. She performed a titration experiment...
A chemist had a bottle of HCl (aq) of unknown concentration. She performed a titration experiment in order to determine its concentration. She pipeted 25.00 mL of the HCl solution into an Erlenmeyer flask. She then added about 21 mL of deionized water and 3 drops of phenolphthalein indicator dye to the flask. She titrated this mixture with 0.09063 M NaOH (aq), and obtained a permanent, pale pink endpoint after the addition of 36.68 mL of NaOH (aq). Given that the density of the HCl solution was 1.075 g/mL, determine the concentration of the original HCl acid solution in units of
a) Molarity
b) Percent by mass
Homework Answers
Add Answer to:
A chemist had a bottle of HCl (aq) of unknown concentration. She
performed a titration experiment...
3. A student pipetted 25.00 mL of a 0.2531 M solution of HCl into an Erlenmeyer...
3. A student pipetted 25.00 mL of a 0.2531 M solution of HCl into an Erlenmeyer flask. After adding 3 drops of phenolphthalein indicator to the flask, the student started adding NaOH from the burette, until the color in the Erlenmeyer flask turned light pink, The student calculated that 21.40 mL NaOH was transferred in the flask to neutralize the acid. a) Calculate the number of moles of HCl initially present (Reaction: NaOH(aq) + HCl(aq) -NaCl(aq) + H2O() b) Calculate...
Prelab Activity: Titrations Continued – Titration of Household Products A 2.40 g sample of vinegar was...
Prelab Activity: Titrations Continued – Titration of Household Products A 2.40 g sample of vinegar was added to an Erlenmeyer flask along with 100 mL of deionized water and 3 drops of phenolphthalein indicator. It took 22.15 mL of 0.0981 M NaOH (aq) to reach the faint pink endpoint. The following balanced chemical equation represents the chemistry of the titration: NaOH (aq) + CH3COOH (aq) à CH3COO–Na+ (aq) + H2O (l) Calculate the mass % of acetic acid (CH3COOH) in...
Determine how many liters (l) of stock HCl were used in titration #1. Please fill all...
Determine how many liters (l) of stock HCl were used
in titration #1.
Please fill all questions under "Data Analysis"
Page 1 is just instruction for Page 2
EXPT 10: TITRATION OF STRONG ACID WITH STRONG BASE Note to Students: when you see the symbol (), this means there is something you must add into the mock data yourself. You may handwrite or type your answers directly on these pages for submission to a Blackboard link. Remember to show all...
An acid-base titration is performed: 250.0 mL of an unknown concentration of HCl(aq) is titrated to...
An acid-base titration is performed: 250.0 mL of an unknown concentration of HCl(aq) is titrated to the equivalence point with 36.7 mL of a 0.1000 M aqueous solution of NaOH. Which of the following statements is not true of this titration? A. At the equivalence point, the OH−concentration in the solution is 3.67×10−3 M. B. The pH is less than 7 after adding 25 mL of NaOH solution. C. The pH at the equivalence point is 7.00. D. The HCl...
In this experiment an EDTA titration was performed. Another common type of titration is an acid-base...
In this experiment an EDTA titration was performed. Another common type of titration is an acid-base titration. Specifically, a neutralization titration can be used to determine the concentration of a strong acid if it is titrated with a strong base whose concentration is known. This method uses stoichiometry to determine the unknown acid's concentration. Let's say a student had 1.0 M sodium hydroxide ( a? ) and found a solution of sulfuric acid 2 04) whose label had faded. She...
Question 40 of 65 > The flask contains 10.0 mL of HCl and a few drops...
Question 40 of 65 > The flask contains 10.0 mL of HCl and a few drops of phenolphthalein indicator. The buret contains 0.140 M NaOH. It requires 12.8 mL of the NaOH solution to reach the end point of the titration. What is the initial concentration of HCI? concentration: MHCI
1. A student carries out a back titration to determine the concentration of ammonium chloride in a solution. The student...
1. A student carries out a back titration to determine the concentration of ammonium chloride in a solution. The student collects 10.80 mL of the original NH4Cl solution and dilutes it to 250.0 mL (we will refer to this as the dilute NH4Cl solution). Then 25.00 mL of the dilute NH4Cl solution are transferred to an Erlenmeyer flask and 25.00 mL of 0.1963 M NaOH are added. Calculate the moles of NaOH added to this Erlenmeyer flask. 2. In the...
A chemist needs to determine the concentration of a solution of nitric acid, HNO3. She puts...
A chemist needs to determine the concentration of a solution of nitric acid, HNO3. She puts 905 mL of the acid in a flask along with a few drops of indicator. She then slowly adds 0.600 M Ba(OH)2 to the flask until the solution turns pink, indicating the equivalence point of the titration. She notes that 205 mL of Ba(OH)2 was needed to reach the equivalence point. a) How many moles of Ba(OH)2 are present in 205 mL of 0.600...
A student performed a titration in which aqueous NaOH (concentration = 0.1000 mol/L) was added via...
A student performed a titration in which aqueous NaOH (concentration = 0.1000 mol/L) was added via burette to a 25.00 mL aliquot of aqueous HCl in an Erlenmeyer flask. Endpoint was reached after the student added 24.01 mL of sodium hydroxide. What concentration of chloride ion is present in the flask once endpoint was reached? Report your answer to three significant figures. Calculate your answer in units of mol/L, but do not input units when submitting your response. Concentration of...
A chemist needs to determine the concentration of a solution of nitric acid, HNO3. She puts...
A chemist needs to determine the concentration of a solution of nitric acid, HNO3. She puts 875 mLof the acid in a flask along with a few drops of indicator. She then slowly adds 0.200 MBa(OH)2 to the flask until the solution turns pink, indicating the equivalence point of the titration. She notes that 145 mL of Ba(OH)2 was needed to reach the equivalence point. Solution map In this titration, the concentration of base is known and can be used...
3. A student pipetted 25.00 mL of a 0.2531 M solution of HCl into an Erlenmeyer flask. After adding 3 drops of phenolphthalein indicator to the flask, the student started adding NaOH from the burette, until the color in the Erlenmeyer flask turned light pink, The student calculated that 21.40 mL NaOH was transferred in the flask to neutralize the acid. a) Calculate the number of moles of HCl initially present (Reaction: NaOH(aq) + HCl(aq) -NaCl(aq) + H2O() b) Calculate...
Determine how many liters (l) of stock HCl were used
in titration #1.
Please fill all questions under "Data Analysis"
Page 1 is just instruction for Page 2
EXPT 10: TITRATION OF STRONG ACID WITH STRONG BASE Note to Students: when you see the symbol (), this means there is something you must add into the mock data yourself. You may handwrite or type your answers directly on these pages for submission to a Blackboard link. Remember to show all...
In this experiment an EDTA titration was performed. Another common type of titration is an acid-base titration. Specifically, a neutralization titration can be used to determine the concentration of a strong acid if it is titrated with a strong base whose concentration is known. This method uses stoichiometry to determine the unknown acid's concentration. Let's say a student had 1.0 M sodium hydroxide ( a? ) and found a solution of sulfuric acid 2 04) whose label had faded. She...
Question 40 of 65 > The flask contains 10.0 mL of HCl and a few drops of phenolphthalein indicator. The buret contains 0.140 M NaOH. It requires 12.8 mL of the NaOH solution to reach the end point of the titration. What is the initial concentration of HCI? concentration: MHCI
A student performed a titration in which aqueous NaOH (concentration = 0.1000 mol/L) was added via burette to a 25.00 mL aliquot of aqueous HCl in an Erlenmeyer flask. Endpoint was reached after the student added 24.01 mL of sodium hydroxide. What concentration of chloride ion is present in the flask once endpoint was reached? Report your answer to three significant figures. Calculate your answer in units of mol/L, but do not input units when submitting your response. Concentration of...
Most questions answered within 3 hours.
-
Russel Wisselink “Have a plan ready for me by 9:00 a.m. tomorrow
morning” was the instruction...
asked 2 minutes from now -
Write the balanced chemical equation for the reaction between
iodate and bisulfite. Does the order with...
asked 20 minutes ago -
how can you efficiently determine the number of atoms
in a sample of an element?
asked 5 minutes ago -
She estimates the following model as Rent = β0 + β1 Bedroom + β2
Bath +...
asked 2 minutes ago -
Calcium dihydrogen phosphate, Ca(H2PO4)2, and sodium hydrogen
carbonate, NaHCO3, are ingredients of baking powder that react...
asked 10 minutes ago -
a car starts from rest at a stop sign. It accelerates
at 4.4m/s² for 7.5s, coasts...
asked 26 minutes ago -
can you identify some rules of how R is calculated for a circuit
in series? For...
asked 18 minutes ago -
Design and implement your own linked list class to hold a sorted
list of integers in...
asked 26 minutes ago -
Swissie Triangular Arbitrage. The following exchange rates are
available to you. (You can buy or sell...
asked 24 minutes ago -
1. Sketch the expected Mass Spectrum of Pentane (C5H12)
2. Draw the most stable Newman projection...
asked 30 minutes ago -
There are changes in the dynamics of a relationship of a family
when family takes on...
asked 32 minutes ago -
Prove that the following is a valid cumulative distribution
function
F(x) = x/(1+x) for a>=0
0...
asked 32 minutes ago