Homework Answers
5. The basic reaction that occurs when CO2 is aerated into pure water is as follows:-
CO2 + H2O <---> HCO3- + H+ (reversible reaction)
Basically the bicarbonate buffer gets created in such a way. There is carbon dioxide that is dissolved in the form of carbonic acid, which helps in neutralizing the OH- ions thereby decreasing the pH of the blood.
On the other hand the bicarbonate ion interacts with the H+ ion which again gets neutralized thereby increasing the blood pH.
Hence there is no change in pH when this event occurs.
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Give a reaction describing the event that occurs when CO2 is
aerated into pure water. (hint:...
a.) Write the reaction that occurs when hydriodic acid, HI, is added to water (don't worry...
a.) Write the reaction that occurs when hydriodic acid, HI, is added to water (don't worry about subscripts and superscripts): (1 mark) b.)What is the pH of a solution of 0.0060 M HI? ( 1 mark)
a) The consecutive equilibria: CO2(g) <=>CO2(aq) + H2O(l) <=>H2CO3(aq) <=>H+(aq) + HCO3-(aq), explain why: A. carbonated beverages are less acidic than pure water. B. carbonated beve...
a) The consecutive equilibria: CO2(g) <=>CO2(aq) + H2O(l) <=>H2CO3(aq) <=>H+(aq) + HCO3-(aq), explain why: A. carbonated beverages are less acidic than pure water. B. carbonated beverages contain measurably less water than the same volume of pure water. C. rainwater is slightly acidic b) A 1.0 M solution of a weak monoprotic acid with Ka = 1.0 10-6 would have a pH of: A. 1 B. 2 C. 3 D. 6 c) Ascorbic acid is a diprotic acid with Ka1 =...
Octane C8H18 is burnt in excess oxygen to give CO2 and water. -5 pts Enthalpy of...
Octane C8H18 is burnt in excess oxygen to give CO2 and water. -5 pts Enthalpy of reaction _C8H18 (1) + O2( → _ _CO2 (g) + _ _ H2O(g) AH = - 10, 922kJ/mol Rxn 1) Is the reaction exothermic or endothermic 2) 2) Balance the reaction. 3) Calculate the energy change when 1 .0L of octane ( d= 0.69g/ml) is burnt in excess oxygen
21. Which of these oxides will produce a basic solution when dissolved in water? A) CO2...
21. Which of these oxides will produce a basic solution when dissolved in water? A) CO2 B) SO C) P205 D) Rb20 Ks = 2.0 x 10-5 22. Calculate the pH of a 0.021 M NaCN solution. [K, = 4.9 x 10-10 A) 1.68 B) 3.18 C) 5.49 D) 7.00 E) 10.82 23. Which response gives the products of hydrolysis of KF? A) KOH + HF B) OH + HF C) KOH + H+F D) KH+ + OH E) No...
QUESTION 3 When pure hydrogen and fluorine change into HF, the reaction releases heat. What does...
QUESTION 3 When pure hydrogen and fluorine change into HF, the reaction releases heat. What does this tell you about the reaction? the formation of pure hydrogen and fluorine from HF would absorb heat the formation of pure hydrogen and fluorine from HF would be exothermic the backward reaction would be exothermic QUESTION 4 250.0 g of H20 at 30.0 °C is heated to 65.0 °C. How many kJ of heat did it gain from the environment? The specific heat,...
1. Published findings in an article written by G. Schmitz report that measured pH values for...
1. Published findings in an article written by G. Schmitz report that measured pH values for 0.10 M acetic acid and for acetic acid/acetate buffer solutions agree well with the calculated values. (For our purposes we will say that good agreement means that the measured and the calculated values agree with each other to within about three tenths of a pH unit or less.) However, measured pH values for 0.10 M sodium acetate are found to be always significantly lower...
1. Thermodynamics and acid solutions a) The following reaction occurs when HCl is bubbled into water...
1. Thermodynamics and acid solutions a) The following reaction occurs when HCl is bubbled into water at 25°C and latm pressure: HCl(g) -> H+(aq) + Cl (aq) Calculate AS rxn for this reaction. b) Sketch two possible structures of the hydronium ion in water. Circle the hydronium ion in each case. Also sketch the local structures of water surrounding the hydronium and chloride ions in aqueous solution. Include the important water molecules in both sets of sketches. c) Draw a...
For the preparation and standardization of NaOH with KHP im supposed to boil water for 1hr and 30 min to remove CO2
For the preparation and standardization of NaOH with KHP im supposed to boil water for 1hr and 30 min to remove CO2....the problem is that if I don't boil it for that long and (30 min) b/c of not enough time but I put the water I boiled for 1/2 hr aproximately into a NaOH bottle with a CO2 absorber and stored it there for a few days. I would assume that I would have to boil the water again...but...
3. Let’s now consider a slightly different reaction, a reaction in solution: Glucose (aq)--->Fructose (aq) a)....
3. Let’s now consider a slightly different reaction, a reaction in solution: Glucose (aq)--->Fructose (aq) a). Give the expression of the equilibrium constant K in terms of the concentration of glucose and fructose in the solution. What kind of reference states do you assume for the two solutes here? b). If someone determined that this conversion has ∆rG0=+1.7kJmol-1 in aqueous solution. If you start off with a solution of 0.1M of pure glucose in the solution, what would be final...
1. Write the balanced chemical equation for the reaction of HF with water. Type your answer...
1. Write the balanced chemical equation for the reaction of HF with water. Type your answer here. 2. What is the pH and concentration of F– in a 0.100M solution of HF? Ans. pH = 2.10 Insert your work image here. 3. Write the balanced chemical equation for the dissolution of NaF in water. Type your answer here. 4. What would happen if the equilibrium [F–] that you calculated in 2 was changed by adding 0.00500 moles of solid NaF to...
Octane C8H18 is burnt in excess oxygen to give CO2 and water. -5 pts Enthalpy of reaction _C8H18 (1) + O2( → _ _CO2 (g) + _ _ H2O(g) AH = - 10, 922kJ/mol Rxn 1) Is the reaction exothermic or endothermic 2) 2) Balance the reaction. 3) Calculate the energy change when 1 .0L of octane ( d= 0.69g/ml) is burnt in excess oxygen
21. Which of these oxides will produce a basic solution when dissolved in water? A) CO2 B) SO C) P205 D) Rb20 Ks = 2.0 x 10-5 22. Calculate the pH of a 0.021 M NaCN solution. [K, = 4.9 x 10-10 A) 1.68 B) 3.18 C) 5.49 D) 7.00 E) 10.82 23. Which response gives the products of hydrolysis of KF? A) KOH + HF B) OH + HF C) KOH + H+F D) KH+ + OH E) No...
QUESTION 3 When pure hydrogen and fluorine change into HF, the reaction releases heat. What does this tell you about the reaction? the formation of pure hydrogen and fluorine from HF would absorb heat the formation of pure hydrogen and fluorine from HF would be exothermic the backward reaction would be exothermic QUESTION 4 250.0 g of H20 at 30.0 °C is heated to 65.0 °C. How many kJ of heat did it gain from the environment? The specific heat,...
1. Thermodynamics and acid solutions a) The following reaction occurs when HCl is bubbled into water at 25°C and latm pressure: HCl(g) -> H+(aq) + Cl (aq) Calculate AS rxn for this reaction. b) Sketch two possible structures of the hydronium ion in water. Circle the hydronium ion in each case. Also sketch the local structures of water surrounding the hydronium and chloride ions in aqueous solution. Include the important water molecules in both sets of sketches. c) Draw a...
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