A charming GT professor finds a bottle of mineral water. The label is torn off except for the analysis below in ppm: Na+ 5.50 K+ 3.90 Ca2+ 29.40 Mg2+ 5.10 SO4-- 31.40 Cl- 2.84 HCO3-91.00 pH 6.76 Use the following molecular weights Ca2+ 40.1 g/mole, Na+ 23 g/mole, Mg2+ 24.3 g/mole, K+ 39.1 g/mole, SO42-96.1 g/mole, Cl- 35.5 g/mole, HCO3- 61.0 g/mole. a) compute the charge balance b) calculate the ionic strength c) calculate the activity coefficients for H+, Ca2+, HCO3- and CO32-

A charming GT professor finds a bottle of mineral water. The label is torn off except for the analysis below in ppm: Na+ 5.50 K+ 3.90 Ca2+ 29.40 Mg2+ 5.10 SO4-- 31.40 Cl- 2.84 HCO3-91.00 pH 6.76 Use the following molecular weights Ca2+ 40.1 g/mole, Na+ 23 g/mole, Mg2+ 24.3 g/mole, K+ 39.1 g/mole, SO42-96.1 g/mole, Cl- 35.5 g/mole, HCO3- 61.0 g/mole. a) compute the charge balance b) calculate the ionic strength c) calculate the activity coefficients for H+, Ca2+, HCO3- and CO32-

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter3: Chemical Reactions

Section: Chapter Questions

Problem 87QRT: You need 300. mL of 0.500-M K2Cr2O7. Which method is best to prepare this solution? Explain your...

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Patients undergoing an upper gastrointestinal tract laboratory test are typically given an X-ray contrast agent that aids with the radiologic imaging of the anatomy. One such contrast agent is sodium diatrizoate, a nonvolatile water-soluble compound. A 0.378-m solution is prepared by dissolving 38.4 g sodium diatrizoate (NaDTZ) in.l.60 102 mL water at 3 1.2C (the density of water at 31.2C is 0.995 g/cm3). What is the molar mass of sodium diatrizoate? What is the vapor pressure of this solution if the vapor pressure of pure water at 31.2C is 34.1 torr?
You need 300. mL of 0.500-M K2Cr2O7. Which method is best to prepare this solution? Explain your choice. (a) Dilute 250. mL of 0.600-M K2Cr2O7 to 300. mL. (b) Add 50.0 mL water to 250. mL of 0.250-M K2Cr2O7. (c) Dilute 125 mL of 1.00-M K2Cr2O7 to 300. mL. (d) Add 30.0 mL of 1.50-M K2Cr2O7 to 270. mL of water.
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150 140 130 120 110 100 90 80 70 60 50 Ka 40 30 20 KCIO3 10 Bwww -Ce₂(50s)s 0 10 20 30 40 50 60 70 80 90 100 Temperature (°C) Rectangular Snip According to the solubility curve graph above, which of the following ionic compounds would be most soluble at 25°C? a NaNO3 b NaCl Time left for this assessment: с KCI d KCIO3 56:45 Grams of solute per 100 g H₂O 000 3 IN NaNO3 KNO3 KHÁ
Grams of solute/100g H 20 150 140 130 120 110 100 90 80 70 60 50 40 30 20 10 0 KI Na2SO47 0 10 Solubility Curve NaNO3 HCI NH3 KNO3 NaCl gases solids NH4CI KCI KCIO3 SO2 20 30 40 50 60 70 80 90 100 Temperature (°C) 1) Find the solubility of potassium nitrate at i) 20 °C, ii) 80 °C 2) Calculate the maximum amount of potassium nitrate that could be dissolved in 20 cm³ of water at 40°C. 3) Find the minimum temperature needed to make a solution of potassium nitrate with a concentration of 2.0 mol dm-³. 4) Compare and contrast the solubility curves of sodium chloride and sodium nitrate 5) Summarise the trends in the solubility curves for solid salts and gases.
2. How many mL of a 0.250 M KCI solution must be diluted to 1.000 L so that the diluted solution (density = 1.00 g/mL ) is 400 ppm K* by weight ? (MW KCI = 74.55; AW K = 39.10)
Given the following: Solutions Flask 1 Flask 2 Flask 3 0.04 M KI 25.0 mL 25.0 mL 12.5 mL 1% starch 5.00mL 5.00mL 5.00mL 0.03 M Na2S2O3 5.50 mL 5.50 mL 5.50 mL 0.05 M H2SO4 5.00 mL 5.00mL 5.00mL 0.08 M NaCl 0 0 10.0 mL and Solutions Beaker 1 Beaker 2 Beaker 3 0.04 M H2O2 25.0 mL 12.5 mL 25.0 mL deioinized water 0 12.5 mL 0 Following the procedure Run 1 is when Beaker 1 is added to Flask 1 and the timer is started giving the time recorded for the run in the table below. This is repeated with Beaker 2 and Flask 2 for Run 2 and finally Beaker 3 and Flask 3 for Run 3: The results for these runs are given below: Run Time (seconds) 1 35 2 66 3 72 Calculate the following for each run: the initial molarities of I- and H2O2 (from the solutions tables) the rates of reaction [I2]/time (calculate the [I2] from [S2O32-] and the reaction: I2(aq) + 2 S2O32-(aq) → 2I-(aq) + S4O62-(aq) Choose the correct rate law for this reaction from your calculations.…
Give only typing answer with explanation and conclusion
100 90 NANO 80 70 Pb(NO)2 KNOS 60 CaCl 50 KCI 40 NaCl 30 20 KCIO, 10 Ce,(SO 10 20 30 40 50 60 70 80 90 100 Temperature (°C) A solution has 20 grams of KCIO, dissolved in 100 grams of water at 70°C. About how many more grams can be added to the solution before becoming saturated? Chp DII @ 23 24 女 2 3 & 6. 7 8 e r y k C V b m alt 口 FONY Solubility (g of salt in 100 g H,O)
Calculate the molarity of 15.4 g of sucrose (C12H22O11) in 74.0 mL of solution, [Molar mass of C12H22O11 = 342.3 g/mol] Note: Answers must be numeric, not alphanumeric—42, not forty-two.
Example: 0.2356 g sample containing only NaCl (MM= 58.44 g/mol) and BaCl₂ (MM= 208.23 g/mol) yielded 0.4637g of dried AgCl (MM= 143.32 g/mole) ppt. Calculate the percent of each compound in the sample?
17- If 125 grams of solid sucrose (C-2H22O11) with 93% purity by mass is dissolved in 250.0 mL of water, what will be the molarity of the sucrose solution formed? C: 12 g/ mol; H: 1 g / mnol; O: 16 g / mol a) 1.07 b) O 1.29 C)O 1.18 d) O 1.36 Boş bırak