Homework Answers
![5.09 - M 142.080.912 13.4 [Naha Pon] = m [Na₂HPO4] =- 120.0 40.912 Using HH equation, PH = pka + log [Nag HP On] IN GHz PDy]](http://img.homeworklib.com/questions/cfdb57e0-3798-11ea-9cf0-5fa69a04b63c.png?x-oss-process=image/resize,w_560)
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Item 1: Question (10 pts.) What is the pH of the buffer that results when 13.4...
Use the References to access important values if needed for this question. What is the pH...
Use the References to access important values if needed for this question. What is the pH of the buffer that results when 13.5 g of NaH PO, and 7.26 g of Na2HPO, are diluted with water to a volume of 0.954 L? (K, of H PO - 6.2E-8, the molar masses of NaH PO, and Na, HPO, are 120.0 g/mol and 142.0 g/mol, respectively) 7.55 6.94 -6.87 7.21 6.87
What is the pH of the buffer that results when 14.0 g of NaH2PO4 and 7.84...
What is the pH of the buffer that results when 14.0 g of NaH2PO4 and 7.84 g of Na2HPO4 are diluted with water to a volume of 0.940 L? (K, of H2PO4 = 6.2E-8, the molar masses of NaH2PO4 and Na2HPO4 are 120.0 g/mol and 142.0 g/mol, respectively) 0 7.21 0 7.53 0 -6.88 O 6.96 O 6.88
Pre-Lab Assignment Hydrogen Phosphate Buffer System This pre-lab assignment is mandatory. You will receive a zero f...
Pre-Lab Assignment Hydrogen Phosphate Buffer System This pre-lab assignment is mandatory. You will receive a zero for the experiment if the pre-lab assignment is not completed before the beginning of the lab session. 1. Calculate the masses of the conjugate acid and base needed to prepare each of the six buffer solutions listed in the table on the left. (p of H,PO,= 6.70) Assume the availability of the phosphate salts listed in the table on the right. Fill out the...
Item 7: Question (10 pts.) Chemical Formulas Scientific Notation Periodic Table Tables In the laboratory you...
Item 7: Question (10 pts.) Chemical Formulas Scientific Notation Periodic Table Tables In the laboratory you are given the task of separating Ca2 and Zn2 lons in aqueous solution For each reagent listed below indicate if it can be used to separate the lons. Type "Y" for yes or "N" for no. If the reagent CAN be used to separate the ions, give the formula of the precipitate. If it cannot, type "No Y or N Reagent Formula of Precipitate...
CHEVI 1045PU5-2010-13095 What is the pH of the buffer that results when 15.0 g of NaH3PO4 and 5.00 g of NazHPO4...
CHEVI 1045PU5-2010-13095 What is the pH of the buffer that results when 15.0 g of NaH3PO4 and 5.00 g of NazHPO4 are diluted with water to a volume of 0.50 L? (Kof H2PO4 = 6.2 x 10, the molar masses of NaH2PO, and Na2HPO4 are 120.0 g/mol and 142.0 mol, respectively) Answer: Check EQUL 485 Uweg Alle ledicamento Villase the pill off Post-Laboratory Questions (Use the spaces provided for the answers and additional paper il necessary 1. Briefly comment on...
Item 2: Question (1 pts.) In a reaction, a reactive intermediate ... Is an energy maximum...
Item 2: Question (1 pts.) In a reaction, a reactive intermediate ... Is an energy maximum between 2 transition states. Is an energy minimum between a reactant and a product. Is an energy minimum between 2 transition states. Is always equal to the number of steps in a reaction. Can never be isolated due to its high energy. Submit Submit and Next O: Mark this question for later review. Skip to Previous Skip to Next → ist usetts, Amherst, MA...
Item 15: Question 4 pts whun of the following protons (Ha He. and Ho) is most...
Item 15: Question 4 pts whun of the following protons (Ha He. and Ho) is most acidic? HA N He Ho O HA OHв ОНp They all have the same acidity Submit Submit and Next Mark this question for later review Skip to Previous Skip to Next → s, Amherst, MA USA
Item 6: Question (10 pts.) Chemical Formulas Scientific Notation Periodic Table Tables compare the solubility of...
Item 6: Question (10 pts.) Chemical Formulas Scientific Notation Periodic Table Tables compare the solubility of silver chloride in each of the following aqueous solutions: 0.10 M NaCH3COO 0.10 M Naci 0.10 M NH NOZ 0.10 M AgCH3COO 1) More soluble than in pure water. 2) Similar solubility as in pure water. 3) Less soluble than in pure water. Submit Submit and Next : Mark this question for later review. Skip to Previous Skip to Next
If you need Ka values, you should use this table: Use the References to access important...
If you need Ka values, you
should use this table:
Use the References to access important values if needed for this question. What is the pH of the buffer that results when 13.5 g of NaH2PO4 and 5.39 g of Na2HPO4 are diluted with water to a volume of 0.759 L? (Kof H2PO4 = 6.2E-8, the molar masses of NaH2PO4 and Na2HPO4 are 120.0 g/mol and 142.0 g/mol, respectively) 6.74 Oo oo O 6.81 O -6.74 O 7.21 O 7.68...
Item 10: Question (10 pts.) Given the following reactions, AgBr(s) = Ag+(aq) + Br-(aq) Kap =...
Item 10: Question (10 pts.) Given the following reactions, AgBr(s) = Ag+(aq) + Br-(aq) Kap = 5.4E-13 Ag+ (aq) + 2 CN-(aq) — Kp = 1.2E+21 Ag(CN), (aq) determine the equilibrium constant for the reaction below. AgBr(s) + 2 CN- (aq) = Ag(CN)2 (aq) + Br(aq) Submit Submit and Next O: Mark this question for later review. - Skip to Previous
Use the References to access important values if needed for this question. What is the pH of the buffer that results when 13.5 g of NaH PO, and 7.26 g of Na2HPO, are diluted with water to a volume of 0.954 L? (K, of H PO - 6.2E-8, the molar masses of NaH PO, and Na, HPO, are 120.0 g/mol and 142.0 g/mol, respectively) 7.55 6.94 -6.87 7.21 6.87
What is the pH of the buffer that results when 14.0 g of NaH2PO4 and 7.84 g of Na2HPO4 are diluted with water to a volume of 0.940 L? (K, of H2PO4 = 6.2E-8, the molar masses of NaH2PO4 and Na2HPO4 are 120.0 g/mol and 142.0 g/mol, respectively) 0 7.21 0 7.53 0 -6.88 O 6.96 O 6.88
Pre-Lab Assignment Hydrogen Phosphate Buffer System This pre-lab assignment is mandatory. You will receive a zero for the experiment if the pre-lab assignment is not completed before the beginning of the lab session. 1. Calculate the masses of the conjugate acid and base needed to prepare each of the six buffer solutions listed in the table on the left. (p of H,PO,= 6.70) Assume the availability of the phosphate salts listed in the table on the right. Fill out the...
Item 7: Question (10 pts.) Chemical Formulas Scientific Notation Periodic Table Tables In the laboratory you are given the task of separating Ca2 and Zn2 lons in aqueous solution For each reagent listed below indicate if it can be used to separate the lons. Type "Y" for yes or "N" for no. If the reagent CAN be used to separate the ions, give the formula of the precipitate. If it cannot, type "No Y or N Reagent Formula of Precipitate...
CHEVI 1045PU5-2010-13095 What is the pH of the buffer that results when 15.0 g of NaH3PO4 and 5.00 g of NazHPO4 are diluted with water to a volume of 0.50 L? (Kof H2PO4 = 6.2 x 10, the molar masses of NaH2PO, and Na2HPO4 are 120.0 g/mol and 142.0 mol, respectively) Answer: Check EQUL 485 Uweg Alle ledicamento Villase the pill off Post-Laboratory Questions (Use the spaces provided for the answers and additional paper il necessary 1. Briefly comment on...
Item 2: Question (1 pts.) In a reaction, a reactive intermediate ... Is an energy maximum between 2 transition states. Is an energy minimum between a reactant and a product. Is an energy minimum between 2 transition states. Is always equal to the number of steps in a reaction. Can never be isolated due to its high energy. Submit Submit and Next O: Mark this question for later review. Skip to Previous Skip to Next → ist usetts, Amherst, MA...
Item 15: Question 4 pts whun of the following protons (Ha He. and Ho) is most acidic? HA N He Ho O HA OHв ОНp They all have the same acidity Submit Submit and Next Mark this question for later review Skip to Previous Skip to Next → s, Amherst, MA USA
Item 6: Question (10 pts.) Chemical Formulas Scientific Notation Periodic Table Tables compare the solubility of silver chloride in each of the following aqueous solutions: 0.10 M NaCH3COO 0.10 M Naci 0.10 M NH NOZ 0.10 M AgCH3COO 1) More soluble than in pure water. 2) Similar solubility as in pure water. 3) Less soluble than in pure water. Submit Submit and Next : Mark this question for later review. Skip to Previous Skip to Next
If you need Ka values, you
should use this table:
Use the References to access important values if needed for this question. What is the pH of the buffer that results when 13.5 g of NaH2PO4 and 5.39 g of Na2HPO4 are diluted with water to a volume of 0.759 L? (Kof H2PO4 = 6.2E-8, the molar masses of NaH2PO4 and Na2HPO4 are 120.0 g/mol and 142.0 g/mol, respectively) 6.74 Oo oo O 6.81 O -6.74 O 7.21 O 7.68...
Item 10: Question (10 pts.) Given the following reactions, AgBr(s) = Ag+(aq) + Br-(aq) Kap = 5.4E-13 Ag+ (aq) + 2 CN-(aq) — Kp = 1.2E+21 Ag(CN), (aq) determine the equilibrium constant for the reaction below. AgBr(s) + 2 CN- (aq) = Ag(CN)2 (aq) + Br(aq) Submit Submit and Next O: Mark this question for later review. - Skip to Previous
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