Seawater contains the following dissolved ions. Convert the concentrations from ppm to molarity. Note that the...
- Seawater contains the following dissolved ions. Convert the concentrations from ppm to molarity. Note that the density of seawater is 1.025 g cm-3.
19,000 ppm Cl−
2,600 ppm SO42−
1,300 ppm Mg2+
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Seawater contains the following dissolved ions. Convert the
concentrations from ppm to molarity. Note that the...
Hard water normally contains mineral ions, such as Ca2+ and Mg2+ ions, from minerals that dissolved...
Hard water normally contains mineral ions, such as Ca2+ and Mg2+ ions, from minerals that dissolved in the ground water. For water of low hardness, the concentration of Ca2+ ions is usually expressed as ppm CaCO3 in the water sample. Parts per million (ppm) is defined as one part of solute mass per 1,000,000 parts of solution mass, as shown in the following equation. Please note, the unit of denominator and numerator needs to be the same. Since ppm expresses...
The following table lists molar concentrations of seven major ions in seawater. Using a density of...
The following table lists molar concentrations of seven major ions in seawater. Using a density of 1.022 g/mL for seawater, convert the concentrations for the following two ions into molality. The sodium ion: The sulfate ion:
(6) A seawater sample has the following composition: Mass Concentrations Mol. Weight Molar Concentrations (a) Convert...
(6) A seawater sample has the following composition: Mass Concentrations Mol. Weight Molar Concentrations (a) Convert these mass concentrations to molar units (moles per liter) assuming density = 1.026 kg/L. Express the results using the appropriate M, mM, MuM, nM etc. notation (for example, 1.35x10^-3 M would be 1.35 mM, 1.35x10^-2 would be 13.5 mM and 1.35x10^-4 would be 135 MuM). (b) What is the salinity of this sample?
1. Aqueous solutions should be electrically neutral. In other words, cations and anions should be balanced...
1. Aqueous solutions should be electrically neutral. In other words, cations and anions should be balanced with each other (charge balance) The following table shows the composition of typical seawater. 1. Set up a charge balance equation for the seawater. (b) Analyze the seawater whether is neutral or not. Note that the seawater constituent are expressed in mass concentrations. Constituent mg/kg (ppm) Sodium (Na*) 10,500 1,350 400 380 Magnesium (Mg2) Calcium (Ca2") Potassium (K) Chloride (Cl) Sulfate (SO2) Bicarbonate (HCO3)...
Determining the amount of sulfate ion (SO2) dissolved in seawater in the unit of molarity QUESTION...
Determining the amount of sulfate ion (SO2) dissolved in seawater in the unit of molarity QUESTION Sulfate concentration in the seawater is about 28 mm (0.028 M). Take the reverse approach to the calculation procedure in the previous Question #1 (so called a backward calculation) and find a rough estimate for the volume of the seawater sample you may need to take from the beach like the one below. A 20.0 mL sample solution contains unknown amount of bromide ion...
Calculate the molarity of each of the following ions. 0.733 g Na+ in 150.0 mL of...
Calculate the molarity of each of the following ions. 0.733 g Na+ in 150.0 mL of a NaCl solution. ___M 0.480 g of Cl– in a 150.0 mL of a NaCl solution. ___M 0.360 g of SO42– in 150.0 mL of Na2SO4 solution. ___M 0.290 g of Ca2+ in 150.0 mL of CaCl2 solution. ___M
Calculate the molarity of each of the following ions. 4th attempt Part 1 (1 point) 0.933...
Calculate the molarity of each of the following ions. 4th attempt Part 1 (1 point) 0.933 g Nat in 130.0 mL of a NaCl solution. Part 2 (1 point) 0.760 g of Cl in a 130.0 mL of a NaCl solution. Part 3 (1 point) 0.400 g of SO42- in 130.0 mL of Na2SO4 solution. Part 4 (1 point) 0.230 g of Ca2+ in 130.0 mL of CaCl2 solution.
Question 5 [11 marks] A seawater which serves as a useful commercial source of magnesium compounds...
Question 5 [11 marks] A seawater which serves as a useful commercial source of magnesium compounds contains a magnesium ion concentration of 0.054 mol dm? The magnesium is precipitated from solution by adding calcium hydroxide. Mg2+ (aq) + Ca(OH)2 (s) → Ca2+(aq) + Mg(OH)2 (s) a) Write an expression for the Ksp of Mg(OH)2, including its units. [3] b) [2] ) The numerical value for Ks is 2.00 x 10-11. Calculate [Mg2+ (aq)] in a saturated solution of Mg(OH)2. Hence...
2. What is the molality of a concentrated solution of NH4Cl at 90°C (see diagram)? Solubility...
2. What is the molality of a concentrated solution of NH4Cl at 90°C (see diagram)? Solubility vs. Temperature for Solids KI NaNO, gases solids KNO, NH,Cl Solubility (grams of solute/100 g H20) KCI 3. If a 250. g solution with 21.4% KClO3 is concentrated, what must be the temperature of the solution (see diagram)? Nach AKCIO 0 SO 10 20 30 40 50 60 70 80 90 100 Temperature °C 4. Calculate the molarity of a solution of copper (11)...
Calculate the molarity of each of the following ions. 6th attempt Part 1 (1 point)FeedbackSee HintSee...
Calculate the molarity of each of the following ions. 6th attempt Part 1 (1 point)FeedbackSee HintSee Periodic Table 0.693 g Na+ in 130.0 mL of a NaCl solution. Part 2 (1 point)FeedbackSee Hint 0.960 g of Cl– in a 130.0 mL of a NaCl solution. Part 3 (1 point)FeedbackSee Hint 0.400 g of SO42– in 130.0 mL of Na2SO4 solution. Part 4 (1 point)FeedbackSee Hint 0.320 g of Ca2+ in 130.0 mL of CaCl2 solution.
The following table lists molar concentrations of seven major ions in seawater. Using a density of 1.022 g/mL for seawater, convert the concentrations for the following two ions into molality. The sodium ion: The sulfate ion:
(6) A seawater sample has the following composition: Mass Concentrations Mol. Weight Molar Concentrations (a) Convert these mass concentrations to molar units (moles per liter) assuming density = 1.026 kg/L. Express the results using the appropriate M, mM, MuM, nM etc. notation (for example, 1.35x10^-3 M would be 1.35 mM, 1.35x10^-2 would be 13.5 mM and 1.35x10^-4 would be 135 MuM). (b) What is the salinity of this sample?
1. Aqueous solutions should be electrically neutral. In other words, cations and anions should be balanced with each other (charge balance) The following table shows the composition of typical seawater. 1. Set up a charge balance equation for the seawater. (b) Analyze the seawater whether is neutral or not. Note that the seawater constituent are expressed in mass concentrations. Constituent mg/kg (ppm) Sodium (Na*) 10,500 1,350 400 380 Magnesium (Mg2) Calcium (Ca2") Potassium (K) Chloride (Cl) Sulfate (SO2) Bicarbonate (HCO3)...
Determining the amount of sulfate ion (SO2) dissolved in seawater in the unit of molarity QUESTION Sulfate concentration in the seawater is about 28 mm (0.028 M). Take the reverse approach to the calculation procedure in the previous Question #1 (so called a backward calculation) and find a rough estimate for the volume of the seawater sample you may need to take from the beach like the one below. A 20.0 mL sample solution contains unknown amount of bromide ion...
Calculate the molarity of each of the following ions. 4th attempt Part 1 (1 point) 0.933 g Nat in 130.0 mL of a NaCl solution. Part 2 (1 point) 0.760 g of Cl in a 130.0 mL of a NaCl solution. Part 3 (1 point) 0.400 g of SO42- in 130.0 mL of Na2SO4 solution. Part 4 (1 point) 0.230 g of Ca2+ in 130.0 mL of CaCl2 solution.
Question 5 [11 marks] A seawater which serves as a useful commercial source of magnesium compounds contains a magnesium ion concentration of 0.054 mol dm? The magnesium is precipitated from solution by adding calcium hydroxide. Mg2+ (aq) + Ca(OH)2 (s) → Ca2+(aq) + Mg(OH)2 (s) a) Write an expression for the Ksp of Mg(OH)2, including its units. [3] b) [2] ) The numerical value for Ks is 2.00 x 10-11. Calculate [Mg2+ (aq)] in a saturated solution of Mg(OH)2. Hence...
2. What is the molality of a concentrated solution of NH4Cl at 90°C (see diagram)? Solubility vs. Temperature for Solids KI NaNO, gases solids KNO, NH,Cl Solubility (grams of solute/100 g H20) KCI 3. If a 250. g solution with 21.4% KClO3 is concentrated, what must be the temperature of the solution (see diagram)? Nach AKCIO 0 SO 10 20 30 40 50 60 70 80 90 100 Temperature °C 4. Calculate the molarity of a solution of copper (11)...
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