Homework Answers
Electroneutality: total positive charge in solution equals to the total negative charge in the solution
Total Calcium ion concentration is equal to carbonate ion concentration plus calcium ion concentration from calcium chloride. Since cabonate ion generates bicarbonate and carbonic acid, total calcium ion concentration equals to sum of carbonate, bicarbonate, carbonic acid and calcium ions from calcium chloride in mass balance equation.
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7. Calcium carbonate is dissolved in a solution of 0.0500 M CaCl2 to make a saturated solution. (...
(6 points) The concentration of calcium in a saturated aqueous solution of calcium carbonate (CaCO3) at...
(6 points) The concentration of calcium in a saturated aqueous solution of calcium carbonate (CaCO3) at 25°C is 6.71x10-SM. What is the Ksp of this sparingly soluble salt? CaCO3(s) = Ca2+(aq) + CO32- (aq) Ksp = (Ca2+)( CO32-)
When 5.5 g of CaCl2 is dissolved in 1 L of solution, the concentration of CaCl2...
When 5.5 g of CaCl2 is dissolved in 1 L of solution, the concentration of CaCl2 is 0.05 molar (0.05 M CaCl2). The solution is also described as being 0.05 M Ca2+(aq) and 0.10 M Cl−(aq). The same solution could be referenced as [Ca2+] = 0.05 M. The circle represents a unit volume. It can be interpreted as “1 L”. Exploring the Model 12. What do the brackets [ ] mean? 13. Explain why the concentration of chloride is twice...
16. Each of three beakers contains 25.0 mL of 0.100 M solution at 25°C. Beaker 1...
16. Each of three beakers contains 25.0 mL of 0.100 M solution at 25°C. Beaker 1 Beaker 2 Beaker 3 0.10 M NaOH 0.10 M NaHCO3 0.10 M H2CO3 a. Determine the pH of the solution in beaker 1. Justify your answer. b. In beaker 2, the reaction HCO, (aq) + H2O(1) = H,CO, (aq) + OH(aq) occurs. The value of K, for HCO, (aq) is 2.3x108 at 25°C. i. Write the K, expression for the reaction of HCO, (aq)...
Calcium carbonate (CaCO3) reacts with stomach acid (HCl, hydrochloric acid) according to the following equation: CaCO3(s)+2HCl(aq)⟶CO2(g)+H2O(l)+CaCl2(aq)...
Calcium carbonate (CaCO3) reacts with stomach acid (HCl, hydrochloric acid) according to the following equation: CaCO3(s)+2HCl(aq)⟶CO2(g)+H2O(l)+CaCl2(aq) Tums, an antacid, contains CaCO3. If Tums is added to 10.0 mL of a solution that is 0.400 M in HCl, how many grams of CO2 gas are produced?
What is the molar concentration of potassium ions in a 0.300 MK2CO3 solution? 0.150 M 0.600...
What is the molar concentration of potassium ions in a 0.300 MK2CO3 solution? 0.150 M 0.600 M 0.900 M 0.300 M Which compound forms an electrolyte solution when dissolved in water? O C2H5OH C6H12O6 (glucose) O Nal O Cl2 A solution is saturated in H2 gas and LiCl at room temperature. What happens if the solution is warmed to 75 °C? Solid LiCl precipitates out of solution. Solid LiCl precipitates out of solution and gaseous H2 bubbles out of solution....
Problem 4: A 0.010 M NHs solution is saturated with weakly soluble AgBr. The pertinent equilibrium...
Problem 4: A 0.010 M NHs solution is saturated with weakly soluble AgBr. The pertinent equilibrium reactions that take place in this solution are: AgBr(s)Ag Br Ag +NH3 Ag(NH3) Ag(NHs) +NHAg(NH3)2 NHs + H2O-NH4+ + OH. 2H2O H3OOH For this system, write: (a) a single charge-balance espression. (b) the mass-balance expressions for the following species: i Br; i) ammonia-containing species; iii) OH.
4. When 0.100 mol ammonia is dissolved in water to make a 500 mL solution, the...
4. When 0.100 mol ammonia is dissolved in water to make a 500 mL solution, the following equilibrium is established NH3(aq) + H2O(0) - NH. (aq) + OH(aq) K = 1.8 x 10-5 a. Find the concentration of OH' and the pH of the solution at equilibrium. Remember: pOH = -log(OH) and pH + pOH = 14 b. Consider the following reaction: 2H2O(1) 2 H,0*(aq) + OH(aq) K = 1.0 x 10-14 Write the equilibrium expression and find the value...
at must be the equilibrium concentration of Question 1 (5 pts). A. If the equilibrium concentration...
at must be the equilibrium concentration of Question 1 (5 pts). A. If the equilibrium concentration of Ce is 0.00010 M, what must be the oqu Cod in the solution? K (Ce (CO)) -59% 10%. (Answer: 3.9 x 10M] B. If the concentration of Ca?" of the solution in 1A is in will some CaCO, begin to precipitate? K (Caco) -1.3 x 10". (Hint: What is the the association of Caland Co, at these concentrations and how does that compare...
2. How many milliliters of 0.100 M HNO, are needed to neutralize the following solution? Write...
2. How many milliliters of 0.100 M HNO, are needed to neutralize the following solution? Write the balanced molecular equation, complete ionic equation, and net ionic equation. 58.5 mL of 0.0100 M Al(OH)3 HNO₃ + KOH KNO3 + H2O 3. a) Balance the following equations. b) Identify oxidizing and reducing agents. e) Determine the oxidation numbers of the elements involved in the redox reaction. Zn (s) + CuSO4 (aq) - ZnSO4 (aq) + Cu(s) 12 (5) + S20;- (aq) +...
3.2-3.9 questions. based on number 3 statement. 3-2. Which of the followine is the chemical reaction...
3.2-3.9 questions. based on number 3 statement.
3-2. Which of the followine is the chemical reaction for it a. Ca(OH) (s) 5 Ca (q) + 2OH() b. Cal (aq) + 2OH(aq) CaOH (s) c. Ca(OH)2 (s) + 2 HCI) CaCl(aq) + 2 H.00) d. CaCl(aq) + 2 H20d) to CaOH) ) + 2HCI) 3-3. How many moles of HCI were added? a. 0.0250 b. 0.000250 c. 0.000375 d. 0.250 3-4. How many moles of Cars were there in the supernatant?...
(6 points) The concentration of calcium in a saturated aqueous solution of calcium carbonate (CaCO3) at 25°C is 6.71x10-SM. What is the Ksp of this sparingly soluble salt? CaCO3(s) = Ca2+(aq) + CO32- (aq) Ksp = (Ca2+)( CO32-)
16. Each of three beakers contains 25.0 mL of 0.100 M solution at 25°C. Beaker 1 Beaker 2 Beaker 3 0.10 M NaOH 0.10 M NaHCO3 0.10 M H2CO3 a. Determine the pH of the solution in beaker 1. Justify your answer. b. In beaker 2, the reaction HCO, (aq) + H2O(1) = H,CO, (aq) + OH(aq) occurs. The value of K, for HCO, (aq) is 2.3x108 at 25°C. i. Write the K, expression for the reaction of HCO, (aq)...
What is the molar concentration of potassium ions in a 0.300 MK2CO3 solution? 0.150 M 0.600 M 0.900 M 0.300 M Which compound forms an electrolyte solution when dissolved in water? O C2H5OH C6H12O6 (glucose) O Nal O Cl2 A solution is saturated in H2 gas and LiCl at room temperature. What happens if the solution is warmed to 75 °C? Solid LiCl precipitates out of solution. Solid LiCl precipitates out of solution and gaseous H2 bubbles out of solution....
Problem 4: A 0.010 M NHs solution is saturated with weakly soluble AgBr. The pertinent equilibrium reactions that take place in this solution are: AgBr(s)Ag Br Ag +NH3 Ag(NH3) Ag(NHs) +NHAg(NH3)2 NHs + H2O-NH4+ + OH. 2H2O H3OOH For this system, write: (a) a single charge-balance espression. (b) the mass-balance expressions for the following species: i Br; i) ammonia-containing species; iii) OH.
4. When 0.100 mol ammonia is dissolved in water to make a 500 mL solution, the following equilibrium is established NH3(aq) + H2O(0) - NH. (aq) + OH(aq) K = 1.8 x 10-5 a. Find the concentration of OH' and the pH of the solution at equilibrium. Remember: pOH = -log(OH) and pH + pOH = 14 b. Consider the following reaction: 2H2O(1) 2 H,0*(aq) + OH(aq) K = 1.0 x 10-14 Write the equilibrium expression and find the value...
at must be the equilibrium concentration of Question 1 (5 pts). A. If the equilibrium concentration of Ce is 0.00010 M, what must be the oqu Cod in the solution? K (Ce (CO)) -59% 10%. (Answer: 3.9 x 10M] B. If the concentration of Ca?" of the solution in 1A is in will some CaCO, begin to precipitate? K (Caco) -1.3 x 10". (Hint: What is the the association of Caland Co, at these concentrations and how does that compare...
2. How many milliliters of 0.100 M HNO, are needed to neutralize the following solution? Write the balanced molecular equation, complete ionic equation, and net ionic equation. 58.5 mL of 0.0100 M Al(OH)3 HNO₃ + KOH KNO3 + H2O 3. a) Balance the following equations. b) Identify oxidizing and reducing agents. e) Determine the oxidation numbers of the elements involved in the redox reaction. Zn (s) + CuSO4 (aq) - ZnSO4 (aq) + Cu(s) 12 (5) + S20;- (aq) +...
3.2-3.9 questions. based on number 3 statement.
3-2. Which of the followine is the chemical reaction for it a. Ca(OH) (s) 5 Ca (q) + 2OH() b. Cal (aq) + 2OH(aq) CaOH (s) c. Ca(OH)2 (s) + 2 HCI) CaCl(aq) + 2 H.00) d. CaCl(aq) + 2 H20d) to CaOH) ) + 2HCI) 3-3. How many moles of HCI were added? a. 0.0250 b. 0.000250 c. 0.000375 d. 0.250 3-4. How many moles of Cars were there in the supernatant?...
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