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Procedure and Post-Lab: both the Procedure and the Post-Lab go together in this lab. After performing...
Post Lab Activity Acids, Bases, pH, and Buffers 1. Calculate the pH of a 0.08 M NaOH solution. 2. Hydrochloric acid...
Post Lab Activity Acids, Bases, pH, and Buffers 1. Calculate the pH of a 0.08 M NaOH solution. 2. Hydrochloric acid is a strong acid and dissociate almost 100% in aqueous solution. If two drops (0.1 mL) of 1.0 MHCI are added to pure water to make 1.0 L solution. What is the pH of this solution? 3. M. What will be the A dilute solution of hydrochloric acid (HCI) has a concentration of 0.1 pH of this solution? 4....
c) Calculate the pH if 95 ml of 10.0M HC (ag) is added to 200.0 ml...
c) Calculate the pH if 95 ml of 10.0M HC (ag) is added to 200.0 ml of this buffer. For full creds, show your work in detail. (4) aj Calculate the pH if 9.5 mL of 10.0 M NaOH (ag) is added to 200.0 mL ofa freshly prepared solution of this buffer. For full credit, show your work in detail (4) e) You should see from the calculations that this buffer is better able to buffer against added acid than...
Exp 7_C Post-Lab Chemical Equilibrium (10 pts/show all work) Determine if the following salts will be...
Exp 7_C Post-Lab Chemical Equilibrium (10 pts/show all work) Determine if the following salts will be acidic, basic, or neutral. For each salt show the 1. balanced equation for ionization in H20 and Example: NaNO2(aq)> Na (aq)+ NO2 (aq) 2. how the ion products form which determine pH by producing OH or H30 Example: NO2(aq) +H20(1) <>HNO2(aq)+ OH (aq) If the salt is neutral give a brief explanation. a) LiF b) BaBr2 c) NHa d) CaSO3 ?) ???.
Post-lab Questions 1. (2pts) Another buffer found in blood is based on the equilibrium between dihydrogen...
Post-lab Questions 1. (2pts) Another buffer found in blood is based on the equilibrium between dihydrogen phosphate and monohydrogen phosphate. The reaction is shown below: H2PO (a)+H2o H,O* (a) НРО, ) -2 + If the pH of a blood sample was 7.35, what would you calculate as the ratio of [H,PO ] to (HРО, 3) (K = 7.5 X 10, K = 6.2 X 10-, Kg 3.6 X 10~13) Pha-toma6oe 7.257.21+10HPO4/HaPOu 2. (4 pts) If you needed to performa reaction...
how do you solve these? I am stuck. DUE AFTER COMPLETING LAB. ANSWER IN SPACE PROVIDED...
how do you solve these? I am stuck.
DUE AFTER COMPLETING LAB. ANSWER IN SPACE PROVIDED Determine the K, of the weak acid HX knowing that a 0.10 M solution of LiX has plH of 8.90. 1. Pyridine, C.H,N, is a weak base and reacts with HCI as folleows 2. C.H,N (aq)+ HCI (aq) CH,NH (aq) CI (aq) What is the pH of a 0.015 M solution of the pyridinium ion (CSH5NH+)? The K, for pyridine is 1.6 x 10-9....
(8 pts) Carbon dioxide in the atmosphere dissolves in water to establish an equilibrium that can...
(8 pts) Carbon dioxide in the atmosphere dissolves in water to establish an equilibrium that can increase the acidity of aqueous solutions in the environment. This equilibrium is CO2(g) = CO2 (aq), Kn= 3.1 x 10-2 at 25°C. Kh is called the Henry's law constant, which relates the solubility of the gas CO2 in the aqueous solution, [CO2), to the partial pressure of CO2 over the solution, p(CO2): [CO2] (M)= Kn · p(CO2) (atm) During the preceding decades, the atmospheric...
Case Study Section 1 – pH Based on “The Case of the Mortified Mom: Acids, pH...
Case Study Section 1 – pH Based on “The Case of the Mortified Mom: Acids, pH and Buffers” by Terry Platt (National Center for Case Study Teaching in Science) The Patient: Paramedics were called to the home of the Mathews family because their 3-year old daughter, Molly, had gotten into the medicine cabinet and consumed a large number of aspirin tablets. When the paramedics arrived Molly had vomited several times, with bits of undissolved tablets visible, but seemed sleepy, almost...
1. An equilibrium mixture of CH.COH and CHCO,has a pH of 4.8. The equino equation is...
1. An equilibrium mixture of CH.COH and CHCO,has a pH of 4.8. The equino equation is given below: CH3CO.H (aq) + H20 (1) = CH,CO2 (aq) + HO* (aq) Answer the following questions when the pH of the solution is adjusted to 2.8. 4. What happens to the concentration of H3O+ (aq) when pH changes from 4.8 to 2.87 b. In which direction does the equilibrium shift in the equation? c. What happens to the concentration of CH,CO2H (aq) when...
What is the general class of each test reaction in the introduction? Precipitation? Acid-Base? Oxidation eduction?...
What is the general class of each test reaction in the introduction? Precipitation? Acid-Base? Oxidation eduction? anoina to aizy ona svidstils Reaction Class 1 2 iliw 15 TO15192do art sshommua bns nosgol rond dass 101 12575 gbubnium oY noi de lo enor Som 10 910 w II woy Xd on abian aningstid on naloga uzib 3 OOH 4 5 DHET 6 7 SET adus 00 9 Complex ion formation 10 11 No reaction 12 13 14 Combination 15 16 17...
(4 pts) (4 pts) (4 pts) (1 pts) 5. Calculations 6. Conclusions 7. Post lab Questions...
(4 pts) (4 pts) (4 pts) (1 pts) 5. Calculations 6. Conclusions 7. Post lab Questions 8. TA signature POST LAB QUESTIONS: 1. Why do we add methanol to the reaction if we see a purple ring? 2. What reaction is occurring with the methanol (show reaction)? Does this reactior affect your product? 3. Why do you get a precipitate when adding the HCl to make the solution acidic? Exp 8-5 Experiment 8: Preparation of Adipic Acid from Cyclohexene Oxidation...
Post Lab Activity Acids, Bases, pH, and Buffers 1. Calculate the pH of a 0.08 M NaOH solution. 2. Hydrochloric acid is a strong acid and dissociate almost 100% in aqueous solution. If two drops (0.1 mL) of 1.0 MHCI are added to pure water to make 1.0 L solution. What is the pH of this solution? 3. M. What will be the A dilute solution of hydrochloric acid (HCI) has a concentration of 0.1 pH of this solution? 4....
c) Calculate the pH if 95 ml of 10.0M HC (ag) is added to 200.0 ml of this buffer. For full creds, show your work in detail. (4) aj Calculate the pH if 9.5 mL of 10.0 M NaOH (ag) is added to 200.0 mL ofa freshly prepared solution of this buffer. For full credit, show your work in detail (4) e) You should see from the calculations that this buffer is better able to buffer against added acid than...
Exp 7_C Post-Lab Chemical Equilibrium (10 pts/show all work) Determine if the following salts will be acidic, basic, or neutral. For each salt show the 1. balanced equation for ionization in H20 and Example: NaNO2(aq)> Na (aq)+ NO2 (aq) 2. how the ion products form which determine pH by producing OH or H30 Example: NO2(aq) +H20(1) <>HNO2(aq)+ OH (aq) If the salt is neutral give a brief explanation. a) LiF b) BaBr2 c) NHa d) CaSO3 ?) ???.
Post-lab Questions 1. (2pts) Another buffer found in blood is based on the equilibrium between dihydrogen phosphate and monohydrogen phosphate. The reaction is shown below: H2PO (a)+H2o H,O* (a) НРО, ) -2 + If the pH of a blood sample was 7.35, what would you calculate as the ratio of [H,PO ] to (HРО, 3) (K = 7.5 X 10, K = 6.2 X 10-, Kg 3.6 X 10~13) Pha-toma6oe 7.257.21+10HPO4/HaPOu 2. (4 pts) If you needed to performa reaction...
how do you solve these? I am stuck.
DUE AFTER COMPLETING LAB. ANSWER IN SPACE PROVIDED Determine the K, of the weak acid HX knowing that a 0.10 M solution of LiX has plH of 8.90. 1. Pyridine, C.H,N, is a weak base and reacts with HCI as folleows 2. C.H,N (aq)+ HCI (aq) CH,NH (aq) CI (aq) What is the pH of a 0.015 M solution of the pyridinium ion (CSH5NH+)? The K, for pyridine is 1.6 x 10-9....
(8 pts) Carbon dioxide in the atmosphere dissolves in water to establish an equilibrium that can increase the acidity of aqueous solutions in the environment. This equilibrium is CO2(g) = CO2 (aq), Kn= 3.1 x 10-2 at 25°C. Kh is called the Henry's law constant, which relates the solubility of the gas CO2 in the aqueous solution, [CO2), to the partial pressure of CO2 over the solution, p(CO2): [CO2] (M)= Kn · p(CO2) (atm) During the preceding decades, the atmospheric...
1. An equilibrium mixture of CH.COH and CHCO,has a pH of 4.8. The equino equation is given below: CH3CO.H (aq) + H20 (1) = CH,CO2 (aq) + HO* (aq) Answer the following questions when the pH of the solution is adjusted to 2.8. 4. What happens to the concentration of H3O+ (aq) when pH changes from 4.8 to 2.87 b. In which direction does the equilibrium shift in the equation? c. What happens to the concentration of CH,CO2H (aq) when...
What is the general class of each test reaction in the introduction? Precipitation? Acid-Base? Oxidation eduction? anoina to aizy ona svidstils Reaction Class 1 2 iliw 15 TO15192do art sshommua bns nosgol rond dass 101 12575 gbubnium oY noi de lo enor Som 10 910 w II woy Xd on abian aningstid on naloga uzib 3 OOH 4 5 DHET 6 7 SET adus 00 9 Complex ion formation 10 11 No reaction 12 13 14 Combination 15 16 17...
(4 pts) (4 pts) (4 pts) (1 pts) 5. Calculations 6. Conclusions 7. Post lab Questions 8. TA signature POST LAB QUESTIONS: 1. Why do we add methanol to the reaction if we see a purple ring? 2. What reaction is occurring with the methanol (show reaction)? Does this reactior affect your product? 3. Why do you get a precipitate when adding the HCl to make the solution acidic? Exp 8-5 Experiment 8: Preparation of Adipic Acid from Cyclohexene Oxidation...
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