A mixture of CaCO3 and MgCO3 weighing 1.00 g consumes 21.86 mL of 1N HCl, with...
A mixture of CaCO3 and MgCO3 weighing 1.00 g consumes 21.86 mL of 1N HCl, with methyl orange as indicator. One gram of this same sample is dissolved in HCl and diluted to one liter. 100 ml is consumed 21.87 mL of a solution of EDTA. EDTA solution with a water hardness is determined. 100 mL of water are taken and consumed 10 mL of EDTA. Express the hardness in ppm of Ca.
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A mixture of CaCO3 and MgCO3 weighing 1.00
g consumes 21.86 mL of 1N HCl, with...
Name Section Experiment 28 Advance Study Assignment: Determination of the Hardness of Water 1. A 0.3946...
Name Section Experiment 28 Advance Study Assignment: Determination of the Hardness of Water 1. A 0.3946 g sample of Caco, is dissolved in 12 M HCl and the resulting solution is diluted to 250.0 mL in a volumetric flask. a. How many moles of Caco, are used (formula mass = 100.1)? moles b. What is the molarity of the Ca2+ in the 250 mL of solution? c. How many moles of Caare in a 25.00-mL aliquot of the solution in...
Chapter 15 Determination of the Hardness of Water 3, A 100-mL. sample of hard water is...
Chapter 15 Determination of the Hardness of Water 3, A 100-mL. sample of hard water is titrated with the EDTA solution in Problem 2. The same amount of Mg' is added as previously, and the volume of EDTA required is 31.84 mL a What volume of EDTA is used in titrating the Ca" in the hard water? mL h How many moles of EDTA are there in that volume? moles c. How many moles of Ca are there in the...
Finely ground mineral (0.5864 g) was dissolved in 25 mL of boiling 4 M HCl and...
Finely ground mineral (0.5864 g) was dissolved in 25 mL of boiling 4 M HCl and diluted with 175 mL H2O containing two drops of methyl red indicator. The solution was heated to 100C, and 50 mL of warm solution containing 2.0 g (NH4)2C2O4 were slowly added to precipitate CaC2O4. Then 6 M NH3 was added until the indicator changed from red to yellow, showing that the liquid was neutral or slightly basic. After slow cooling for 1 h, the...
An impure sample of lime weighing 0.150g was reacted with 50.00cm3 of 0.8mol/L hydrochloric acid. After...
An impure sample of lime weighing 0.150g was reacted with 50.00cm3 of 0.8mol/L hydrochloric acid. After the reaction was complete the solution was transferred to a 250cm3 volumetric flask and made up to the mark with distilled water. A 25.00cm3 portion of this solution was then titrated against 0.25mol/L sodium hydroxide using methyl orange as the indicator. A 15.00cm3 volume of the sodium hydroxide was consumed. Calculate the percentage purity of lime sample. Unbalanced equations are as follows; CaCO3(s) +...
If 1.85 g MgO is combined with enough 1.00 M HCl to make 100.0 mL of...
If 1.85 g MgO is combined with enough 1.00 M HCl to make 100.0 mL of solution in a coffee-cup calorimeter, the temperature of the resulting solution increases from 21.3°C to 35.7 °C. Calculate the enthalpy change for the reaction per mole of Mgo. Assume that the specific heat capacity of the solution is 4.18 J/g.K, and the density of the solution is 1.00 g/mL. A 0.704 g of a pure acid, HA, is dissolved in water and an acid-base...
CALCIUM HARDNESS DETERMINATION Fill a 50 mL burette with 0.01 M EDTA solution, making sure the...
CALCIUM HARDNESS DETERMINATION Fill a 50 mL burette with 0.01 M EDTA solution, making sure the tip is full and free of air bubbles. Set Start volume. Add 50.00 mL of an unknown hard water solution into a 100 mL beaker. Obtain Magnetic Stirrer from Equipment menu. Place beaker on stirrer. Increase Stir from the context menu. Add 4 mL of 1.0 M Sodium Hydroxide. Add 100 mg of Murexide indicator. Titrate with the 0.01 M EDTA until the color...
If the solubility of sodium chloride (NaCl) is 30.6 g/100 mL of H2O at a given...
If the solubility of sodium chloride (NaCl) is 30.6 g/100 mL of H2O at a given temperature, how many grams of NaCl can be dissolved in 250.0 mL of H2O? If the solubility of glucose (C6H12O6) is 120.3 g/100 mL of H2O at a given temperature, how many grams of C6H12O6 can be dissolved in 75.0 mL of H2O? Only 0.203 mL of C6H6 will dissolve in 100.000 mL of H2O. Assuming that the volumes are additive, find the volume/volume...
1. Write the balanced equation for the reaction between calcium carbonate and hydrochloric acid in water,...
1. Write the balanced equation for the reaction between calcium carbonate and hydrochloric acid in water, generating aqueous calcium chloride and liberating carbon dioxide gas. (You will need this for Part 1 of the experiment!) 2. Calculate the concentration of one liter of the resulting calcium chloride solution (assuming you started with 102.7 mg of calcium carbonate) in units of molar and millimolar. Also calculate the concentration in "parts-per-million as CaCO3". (Refer to section 13.5 of your textbook, if needed.)...
124 2. Write the balan 2. Write the balanced total reaction that would occur w neutralizes...
124 2. Write the balan 2. Write the balanced total reaction that would occur w neutralizes stomach acid (HCl(). occur when the antacid Alka-2 (Al(OH):) bet ionic reaction: H ) + OH(aq) - H30 3. What volume of fluid would be delivered from the bure meniscus moves from its initial location to its final location are milliliter units. Use the correct number of significant 118 ered from the buret shown in the figure if the on to its final location?...
1. A 19.6 gram sample of KCl is used to make a 275. mL KCl solution....
1. A 19.6 gram sample of KCl is used to make a 275. mL KCl solution. What is the molarity of the KCl solution? 2. A chemist has a bottle containing 0.25 M CuCl2. How many milliliters of this solution should the chemist use to add 12.0 grams of CuCl2 to her reaction? 3. In a saturated solution of the ionic compound sodium sulfate, Na3PO4 all of the water molecules are involved in the hydration process. some solid Na3PO4 is...
Name Section Experiment 28 Advance Study Assignment: Determination of the Hardness of Water 1. A 0.3946 g sample of Caco, is dissolved in 12 M HCl and the resulting solution is diluted to 250.0 mL in a volumetric flask. a. How many moles of Caco, are used (formula mass = 100.1)? moles b. What is the molarity of the Ca2+ in the 250 mL of solution? c. How many moles of Caare in a 25.00-mL aliquot of the solution in...
Chapter 15 Determination of the Hardness of Water 3, A 100-mL. sample of hard water is titrated with the EDTA solution in Problem 2. The same amount of Mg' is added as previously, and the volume of EDTA required is 31.84 mL a What volume of EDTA is used in titrating the Ca" in the hard water? mL h How many moles of EDTA are there in that volume? moles c. How many moles of Ca are there in the...
If 1.85 g MgO is combined with enough 1.00 M HCl to make 100.0 mL of solution in a coffee-cup calorimeter, the temperature of the resulting solution increases from 21.3°C to 35.7 °C. Calculate the enthalpy change for the reaction per mole of Mgo. Assume that the specific heat capacity of the solution is 4.18 J/g.K, and the density of the solution is 1.00 g/mL. A 0.704 g of a pure acid, HA, is dissolved in water and an acid-base...
1. Write the balanced equation for the reaction between calcium carbonate and hydrochloric acid in water, generating aqueous calcium chloride and liberating carbon dioxide gas. (You will need this for Part 1 of the experiment!) 2. Calculate the concentration of one liter of the resulting calcium chloride solution (assuming you started with 102.7 mg of calcium carbonate) in units of molar and millimolar. Also calculate the concentration in "parts-per-million as CaCO3". (Refer to section 13.5 of your textbook, if needed.)...
124 2. Write the balan 2. Write the balanced total reaction that would occur w neutralizes stomach acid (HCl(). occur when the antacid Alka-2 (Al(OH):) bet ionic reaction: H ) + OH(aq) - H30 3. What volume of fluid would be delivered from the bure meniscus moves from its initial location to its final location are milliliter units. Use the correct number of significant 118 ered from the buret shown in the figure if the on to its final location?...
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