Homework Answers
When you add NaNO2, it results inore number of NO2- ions. But concentration of H+ remains same. Only Na+ and NO2- ions will increase. Thus, after addition of NaNO2, NO2- will react with H3O+ to form HNO2 and H2O. Thus, backward reaction is favoured and pH will change (decreases). Option D is the right answer.
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6. If you add 0.1 M NaNO2 to 0.1 M HNO2 (see the reaction below) will...
7. If you add 0.3 M NaHSO3 to a solution of 0.1 M H2SO3 (see reaction),...
7. If you add 0.3 M NaHSO3 to a solution of 0.1 M H2SO3 (see reaction), how will the pH change? H2SO3(aq) + H2O(aq) = H30+(aq) + HSO3-(aq) A. It will stay the same. B. It will go down. C. It will go up.
Question 1 1 pts Consider a solution that is 0.1 M HF and 0.1 M NaF....
Question 1 1 pts Consider a solution that is 0.1 M HF and 0.1 M NaF. This is a mixture of conjugates in equal proportions, which tells you that it is a buffer. What two reactions are relevant to the pH in this situation? NaF --> Nat + F F+H2O <--> HF + OH- HF + NaF --> H+ +Na+ + F2 HF <--> H+ +F Ht+F<--> Nat + F" Question 2 1 pts A buffer solution contains a mixture...
(YES/NO) (ADDED ACID/ADDED BASE) A buffer solution that is 0.322 M in HNO2 and 0.322 M...
(YES/NO) (ADDED ACID/ADDED BASE)
A buffer solution that is 0.322 M in HNO2 and 0.322 M in NaNO, has a pH of 3.35. Addition of which of the following would increase the capacity of the buffer for added OH"? (Select all that apply.) OHNO2 pure water O both HNO, and NaNO2 NaNO2 Onone of the above Use the References to access important values if needed for this question. The PK, value for HNO2 is 3.35. Would a buffer prepared from...
6) A stock solution of HCl is 11.50 M, if 15.29 ml of the stock solution...
6) A stock solution of HCl is 11.50 M, if 15.29 ml of the stock solution is diluted with water to a total volume of 5.000 L what is the pH, POH, [H3O*], and (OH) at 25°C of the new (dilute) solution? (show your work). pH : рон: [H30*) : [OH') : Experimental Data, Observations, and Calculations - Use correct sig figs and units for all measurements and calculations Part B: Standard pH What color do you see for each...
3. Explain the series of color changes that can occur on thymol blue indicator by the...
3. Explain the series of color changes that can occur on thymol blue indicator by the addition of the following solutions. In each case, give the approximate pH of the solution Color change Red to Yellow Yellow to Blue pH range 12 to 2.8 Thymol blue 8.2 to 9.1 a) A few drops of thymol blue are added to 0.1 M aqueous solution of HCl(aq). b) By adding some solid sodium acetate, NaCH,O2 to a solution of (a) e) By...
13) A 0.0035 M aqueous solution of a particular compound has pOH 11.54. The compound is...
13) A 0.0035 M aqueous solution of a particular compound has pOH 11.54. The compound is a) a weak base b) a weak acid c) a strong base a strong acid e) a salt 14) In basic solution, a) [H30'> [OH] b) [H30 ]- [OH1 [Hs0)< [OH] d) (OH]<7.00 e) [OH] =OM 15) The pH of a 0.63 M aqueous solution of hypobromous acid, HBro, at 25°C is 4.17. What is the value of K for HBro? a2.0 x 10...
Name Part B. Iron un Chloride (FeCl) plus Potassium Thiocyanate (KSCN Prepare a stock solution to...
Name Part B. Iron un Chloride (FeCl) plus Potassium Thiocyanate (KSCN Prepare a stock solution to be tested by adding 12 drops each of 0.1 M FeCl, and 0.1 MKSON well. Fill each of four medium sized test tubes (all the same size) half full of the stock solution FeSCN'(a) pale yellow colorless 1. The first tube is a control. Always compare to this color. 2. Add 20 drops of 0.1 Miron () chloride solution to the second tube. Observe...
can someone please help me out with questions 1-5, please To add more information this was...
can someone please help me out with questions 1-5, please
To add more information this was given to me for a lab that used
a weak acid and we added a strong base through titration. We just
observed how the ph changes. Later we then used a buffer with a
weak acid to see how buffers affect ph change. These questions are
basically surrounded around those topics to help us prepare.
However, I'm kinda confused about answering them because weak...
questions 9,10 and 11 please! thank you lying 0.23 mol of hypochlorous acid and 0.27 mol...
questions 9,10 and 11 please! thank you
lying 0.23 mol of hypochlorous acid and 0.27 mol of sodium fent to yield 1.00 L of solution. The addition of 0.05 mol of NaOH to this to increase slightly. The pH does not increase drastically because the present in the buffer solution. The Ka of hypochlorous acid is A solution is prepared by dissolu hupachlorite in water sufficien buffer solution causes the pH toinen NaOH reacts with the 30.10-8 Ohypochlorous acid B)...
Part I Color changes of Methyl Violet. We will study the following reaction: HMV (aq) +...
Part I Color changes of Methyl Violet. We will study the following reaction: HMV (aq) + MV (aq) + H* (aq) yellow greenish-blue violet Step 1. Place about 4 mL of distilled water in a regular test tube. Add two drops of methyl violet indicator. Record the color of the solution. Violet Next, add drop by drop, add 6M HCI. This forces equilibrium to be shifted to the left or right-circle the right answer). Adding HCl changes color from to...
7. If you add 0.3 M NaHSO3 to a solution of 0.1 M H2SO3 (see reaction), how will the pH change? H2SO3(aq) + H2O(aq) = H30+(aq) + HSO3-(aq) A. It will stay the same. B. It will go down. C. It will go up.
Question 1 1 pts Consider a solution that is 0.1 M HF and 0.1 M NaF. This is a mixture of conjugates in equal proportions, which tells you that it is a buffer. What two reactions are relevant to the pH in this situation? NaF --> Nat + F F+H2O <--> HF + OH- HF + NaF --> H+ +Na+ + F2 HF <--> H+ +F Ht+F<--> Nat + F" Question 2 1 pts A buffer solution contains a mixture...
(YES/NO) (ADDED ACID/ADDED BASE)
A buffer solution that is 0.322 M in HNO2 and 0.322 M in NaNO, has a pH of 3.35. Addition of which of the following would increase the capacity of the buffer for added OH"? (Select all that apply.) OHNO2 pure water O both HNO, and NaNO2 NaNO2 Onone of the above Use the References to access important values if needed for this question. The PK, value for HNO2 is 3.35. Would a buffer prepared from...
6) A stock solution of HCl is 11.50 M, if 15.29 ml of the stock solution is diluted with water to a total volume of 5.000 L what is the pH, POH, [H3O*], and (OH) at 25°C of the new (dilute) solution? (show your work). pH : рон: [H30*) : [OH') : Experimental Data, Observations, and Calculations - Use correct sig figs and units for all measurements and calculations Part B: Standard pH What color do you see for each...
3. Explain the series of color changes that can occur on thymol blue indicator by the addition of the following solutions. In each case, give the approximate pH of the solution Color change Red to Yellow Yellow to Blue pH range 12 to 2.8 Thymol blue 8.2 to 9.1 a) A few drops of thymol blue are added to 0.1 M aqueous solution of HCl(aq). b) By adding some solid sodium acetate, NaCH,O2 to a solution of (a) e) By...
13) A 0.0035 M aqueous solution of a particular compound has pOH 11.54. The compound is a) a weak base b) a weak acid c) a strong base a strong acid e) a salt 14) In basic solution, a) [H30'> [OH] b) [H30 ]- [OH1 [Hs0)< [OH] d) (OH]<7.00 e) [OH] =OM 15) The pH of a 0.63 M aqueous solution of hypobromous acid, HBro, at 25°C is 4.17. What is the value of K for HBro? a2.0 x 10...
Name Part B. Iron un Chloride (FeCl) plus Potassium Thiocyanate (KSCN Prepare a stock solution to be tested by adding 12 drops each of 0.1 M FeCl, and 0.1 MKSON well. Fill each of four medium sized test tubes (all the same size) half full of the stock solution FeSCN'(a) pale yellow colorless 1. The first tube is a control. Always compare to this color. 2. Add 20 drops of 0.1 Miron () chloride solution to the second tube. Observe...
can someone please help me out with questions 1-5, please
To add more information this was given to me for a lab that used
a weak acid and we added a strong base through titration. We just
observed how the ph changes. Later we then used a buffer with a
weak acid to see how buffers affect ph change. These questions are
basically surrounded around those topics to help us prepare.
However, I'm kinda confused about answering them because weak...
questions 9,10 and 11 please! thank you
lying 0.23 mol of hypochlorous acid and 0.27 mol of sodium fent to yield 1.00 L of solution. The addition of 0.05 mol of NaOH to this to increase slightly. The pH does not increase drastically because the present in the buffer solution. The Ka of hypochlorous acid is A solution is prepared by dissolu hupachlorite in water sufficien buffer solution causes the pH toinen NaOH reacts with the 30.10-8 Ohypochlorous acid B)...
Part I Color changes of Methyl Violet. We will study the following reaction: HMV (aq) + MV (aq) + H* (aq) yellow greenish-blue violet Step 1. Place about 4 mL of distilled water in a regular test tube. Add two drops of methyl violet indicator. Record the color of the solution. Violet Next, add drop by drop, add 6M HCI. This forces equilibrium to be shifted to the left or right-circle the right answer). Adding HCl changes color from to...
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