Homework Answers
We can predict the colour of solution:
1.
pOH = -log(0.4) = 0.39
pH = 14 - pOH = 14 - 0.39 = 13.63
When NaOH (Base) added with methyl orange then the colour of solution is predicted Yellow.
2.
pH = -log(o.3) = 0.522, pH value is less than 6.8 means acid.
When HCl (Acid) added with phenol red then the colour of solution is predicted Yellow.
3.
At pH range 4 to 5.6
When acid and base both are titrated with bromocresol green, Blue colour is predicted.
4.
pH range observed 8 to 10
When acid and base both titrated with phenolphthalene, pink colour is predicted.
Add Answer to:
Question (3): Predict the color of the following solutions: 1- 5 mL of 0.4 M NAOH...
Consider the titration of 25.00 mL of 0.115M NH3 (ka= 5.70e-10 ; kb= 1.75e-5) with 0.0920...
Consider the titration of 25.00 mL of 0.115M NH3 (ka= 5.70e-10 ;
kb= 1.75e-5) with 0.0920 M HCl.
a) calculate the pH of the solution for the following volume of
HCl: 6.25 mL
b) calculate the pH of the solution for the following volume of
HCl: 31.25 mL
c) calculate the pH of the solution for the following volume of
HCl: 50.0 mL
d) Which indicator from the table minimizes the titration error
and why?
blue Indicator thymol blue bromophenol...
The following graph shows the pH curve for the titration of 25 mL of a 0.1...
The following graph shows the pH curve for the titration of 25
mL of a 0.1 M monoprotic acid solution with a 0.1 M solution of a
monoprotic base.
mL of 0.1 M base added
(1) The pH curve represents the titration of a
_______(weak/strong) acid with a _______(weak/strong)base.
(2) Choose a suitable indicator for the endpoint
of the titration from the following pulldown list
__________.(bromocresol green / methyl red / bromothymol blue /
cresol red / thymol blue /...
Be sure to answer all parts. Use the figure below to find an indicator for these titrations: (a) 0.10 M CH3NH2(Kb = 4.4...
Be sure to answer all parts. Use the figure below to find an indicator for these titrations: (a) 0.10 M CH3NH2(Kb = 4.4 x 10-4) with 0.10 M HCI (select) (b) 0.50 M HI with 0.10 M KOH ((select) 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Crystal violet Thymol blue 2,4-Dinitrophenol Bromophenol blue Bromocresol green Methyl red Alizarin Bromothymol blue Phenol red Phenolphthalein Alizarin yellow R
The following graph shows the pH curve for the titration of 25 mL of a 0.1 M monoprotic acid solution with a 0.1 M solut...
The following graph shows the pH curve for the titration of 25
mL of a 0.1 M monoprotic acid solution with a 0.1 M solution of a
monoprotic base.
#1's drop down menus both read weak/strong.
#2's drop down menu features a list of all the colors listed on the
graph.
0 5 10 15 20 25 30 35 40 45 50 mL of 0.1 M base added (1) The pH curve represents the titration of a __ acid with...
QUESTION 1 6 points Save Answer The purpose of an indicator in an acid-base titration is...
QUESTION 1 6 points Save Answer The purpose of an indicator in an acid-base titration is to indicate the of the titration. Use Table 10.2 for the following question. If an acidic solution is titrated with a basic solution and methyl violet is used as an indicator, the solution color will change from to QUESTION 2 3 points Save Answer The molarity of a solution prepared by dissolving 17.0 g of hydrochloric acid (HCI (aq) in 133 mL of water...
you. 12e) phenolphthalein (color change between pH-8-10), bromocresol green color change between pH 3-4) are provided...
you. 12e) phenolphthalein (color change between pH-8-10), bromocresol green color change between pH 3-4) are provided to pH change at point of Proposed indicator inflection titration between HCl and 1 to 11 NaOH 12d) Calculate the pH of the solution when 10 mL of 0.1 M NaOH is added to 25 mL 0.1 M HCI .Write appropriate chemical equations if required and show your math!!!(4 points) In the ICE table started for calculating equilibrium concentrations of the reaction shown, the...
Referring to figure 10.4 choose an appropriate indicator for each titration. Justify your answer The last...
Referring to figure 10.4 choose an appropriate indicator for each
titration. Justify your answer
The last page shows data from titration
whether phenolphthalein is a good 7 Referring to Figure 10.4, choose an appropr to Figure 10.4, choose an appropriate indicator for each titration. Justify your answer. 0.1UM Acidic indicator pH range Basic Thymol Blue 11 12 13 12-28 and 8.0-92 14 Methyl Orange Bromophenol Blue 10-4. Congo Red 30-50 Bromocresol Green 3.8-5.4 Methyl Red 44-62 Bromothymol Blue 6.0-7.6 Phenol...
For each of the solutions described below, determine the pH range for the solution using the...
For each of the solutions described below, determine the pH range for the solution using the information given and the indicator chart Solution A Indicator Used alizarin yellow Indicator color Yellow bromthymol blue yellow methyl violet violet Range bear the 21 less than 7.6 leathen lib really them 5.1 Gooher the 3.2 bromcresol green green methyl red red The pH range for solution A is 3.2 7.6 Solution B Indicator Used methyl red Indicator color yellow Range leroth 67 alizarin...
Identify an unknown solution (1, 2, 3 and 4) and fill the vacancies in the table...
Identify an unknown solution (1, 2, 3 and 4) and fill
the vacancies in the table
Procedure
The unknown solutions are : HCl, NaOH,
Acetic acid, Na2CO3
Test each solution with litmus paper. Record the results in the
data table below.
Take little of each solution in a test tube and add 5 drops of
silver nitrate to each solution. Record the results in the data
table.
Take little of each solution in a test tube and add two drops...
18.5 mL of NaOH were required to titrate KHC.H4O4. Set up 3-step stoic concentration of NaOH....
18.5 mL of NaOH were required to titrate KHC.H4O4. Set up 3-step stoic concentration of NaOH. to titrate 0.242g of KHPhthalate, formula EP stoichiometric calculation for finding the [Answer: I. 1.185x10-3 mol KHPhthalate; l, 1.185 10 mol NaOH: III. 0,0640 M NaOH 2. The indicators below have the acid and base cators below have the acid and base colors shown. Their colors in the hair-equivalence solution of a weak acid is also shown. Estimate the pka or the weak acid....
Consider the titration of 25.00 mL of 0.115M NH3 (ka= 5.70e-10 ;
kb= 1.75e-5) with 0.0920 M HCl.
a) calculate the pH of the solution for the following volume of
HCl: 6.25 mL
b) calculate the pH of the solution for the following volume of
HCl: 31.25 mL
c) calculate the pH of the solution for the following volume of
HCl: 50.0 mL
d) Which indicator from the table minimizes the titration error
and why?
blue Indicator thymol blue bromophenol...
The following graph shows the pH curve for the titration of 25
mL of a 0.1 M monoprotic acid solution with a 0.1 M solution of a
monoprotic base.
mL of 0.1 M base added
(1) The pH curve represents the titration of a
_______(weak/strong) acid with a _______(weak/strong)base.
(2) Choose a suitable indicator for the endpoint
of the titration from the following pulldown list
__________.(bromocresol green / methyl red / bromothymol blue /
cresol red / thymol blue /...
Be sure to answer all parts. Use the figure below to find an indicator for these titrations: (a) 0.10 M CH3NH2(Kb = 4.4 x 10-4) with 0.10 M HCI (select) (b) 0.50 M HI with 0.10 M KOH ((select) 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Crystal violet Thymol blue 2,4-Dinitrophenol Bromophenol blue Bromocresol green Methyl red Alizarin Bromothymol blue Phenol red Phenolphthalein Alizarin yellow R
The following graph shows the pH curve for the titration of 25
mL of a 0.1 M monoprotic acid solution with a 0.1 M solution of a
monoprotic base.
#1's drop down menus both read weak/strong.
#2's drop down menu features a list of all the colors listed on the
graph.
0 5 10 15 20 25 30 35 40 45 50 mL of 0.1 M base added (1) The pH curve represents the titration of a __ acid with...
QUESTION 1 6 points Save Answer The purpose of an indicator in an acid-base titration is to indicate the of the titration. Use Table 10.2 for the following question. If an acidic solution is titrated with a basic solution and methyl violet is used as an indicator, the solution color will change from to QUESTION 2 3 points Save Answer The molarity of a solution prepared by dissolving 17.0 g of hydrochloric acid (HCI (aq) in 133 mL of water...
you. 12e) phenolphthalein (color change between pH-8-10), bromocresol green color change between pH 3-4) are provided to pH change at point of Proposed indicator inflection titration between HCl and 1 to 11 NaOH 12d) Calculate the pH of the solution when 10 mL of 0.1 M NaOH is added to 25 mL 0.1 M HCI .Write appropriate chemical equations if required and show your math!!!(4 points) In the ICE table started for calculating equilibrium concentrations of the reaction shown, the...
Referring to figure 10.4 choose an appropriate indicator for each
titration. Justify your answer
The last page shows data from titration
whether phenolphthalein is a good 7 Referring to Figure 10.4, choose an appropr to Figure 10.4, choose an appropriate indicator for each titration. Justify your answer. 0.1UM Acidic indicator pH range Basic Thymol Blue 11 12 13 12-28 and 8.0-92 14 Methyl Orange Bromophenol Blue 10-4. Congo Red 30-50 Bromocresol Green 3.8-5.4 Methyl Red 44-62 Bromothymol Blue 6.0-7.6 Phenol...
For each of the solutions described below, determine the pH range for the solution using the information given and the indicator chart Solution A Indicator Used alizarin yellow Indicator color Yellow bromthymol blue yellow methyl violet violet Range bear the 21 less than 7.6 leathen lib really them 5.1 Gooher the 3.2 bromcresol green green methyl red red The pH range for solution A is 3.2 7.6 Solution B Indicator Used methyl red Indicator color yellow Range leroth 67 alizarin...
Identify an unknown solution (1, 2, 3 and 4) and fill
the vacancies in the table
Procedure
The unknown solutions are : HCl, NaOH,
Acetic acid, Na2CO3
Test each solution with litmus paper. Record the results in the
data table below.
Take little of each solution in a test tube and add 5 drops of
silver nitrate to each solution. Record the results in the data
table.
Take little of each solution in a test tube and add two drops...
18.5 mL of NaOH were required to titrate KHC.H4O4. Set up 3-step stoic concentration of NaOH. to titrate 0.242g of KHPhthalate, formula EP stoichiometric calculation for finding the [Answer: I. 1.185x10-3 mol KHPhthalate; l, 1.185 10 mol NaOH: III. 0,0640 M NaOH 2. The indicators below have the acid and base cators below have the acid and base colors shown. Their colors in the hair-equivalence solution of a weak acid is also shown. Estimate the pka or the weak acid....
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