3. A 100 mL sample of hard water is titrated with 22.4 mL of the EDTA solution from problem 2. The same amount of MgCl, is added as previously and the total volume of EDTA solution required is 22.44 mL. d) Assume all of the Ca* in the water comes from CACO3. moles of CaCO, are in 1 L of water? How many moles How many grams of CaCO, are in 1 L of water? grams

3. A 100 mL sample of hard water is titrated with 22.4 mL of the EDTA solution from problem 2. The same amount of MgCl, is added as previously and the total volume of EDTA solution required is 22.44 mL. d) Assume all of the Ca* in the water comes from CACO3. moles of CaCO, are in 1 L of water? How many moles How many grams of CaCO, are in 1 L of water? grams

Introductory Chemistry: A Foundation

9th Edition

ISBN:9781337399425

Author:Steven S. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Donald J. DeCoste

Chapter15: Solutions

Section: Chapter Questions

Problem 95AP: 95. Many metal ions form insoluble sulfide compounds when a solution of the metal ion is treated...

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In Exercise 12.49, what is the allowed concentration of AgCl in g per 100 g of water? The Safe Drinking Water Act of 1974 established the maximum permitted concentration of silver ion at 0.05 ppm. What is the concentration of Ag+ in parts per million in a saturated solution of AgCl? (NOTE: 1 ppm = 1 mgofsolute/L of solution.)
12.49 The Safe Drinking Water Act of 1974 established the maximum permitted concentration of silver ion at 0.05 ppm. What is the concentration of Ag+ in parts per million in a saturated solution of AgCl? (NOTE: 1 ppm = 1 mg of solute/L of solution.)
95. Many metal ions form insoluble sulfide compounds when a solution of the metal ion is treated with hydrogen sulfide gas. For example, nickel(II) precipitates nearly quantitatively as NiS when H2S gas is bubbled through a nickel ion solution. How many milliliters of gaseous H2S at STP are needed to precipitate all (he nickel ion present in 10. mL of 0.050 M NiCl2 solution?
1. What is pCl for a solution of 0.0345 M in ZnCl,? Type only the numerical value in standard form-four significant figures. 2. What is the ppm of the C,H0, if 3.0 mg of it found in 300 kg of drinking water? Type the numerical value in standard form with unit (ppm) - one significant figure
How many grams of Cr will react with 150 ml of 5.00 M HCl? Given: 2 Cr + 6HCl ---->. 2 CrCl3 + 3 H2
The mass of magnesium fluoride that is dissolved in 150 mL of a saturated solution is _______ grams. The volume of water needed to dissolve 0.0671 grams of calcium hydroxide is ______ L.Assume no volume change upon addition of the solid.
1. A solution contains a mixture of Na2CO3 and NaOH. Using phenolphthalein indicator 25 mL of mixture required 19.5 mL of 0.995 M HCl for the endpoint. With methyl orange, 25 mL of solution required 25 mL of the same HCl for the endpoint. Calculate grams per liter of Na2CO3 in the mixture. a.23b.36 c.78 d.112. A 1.2040 g sample containing sodium carbonate and inert material was dissolved in water and titrated to methyl orange end point, requiring 32.50 mL of 0.1020 M HCl. Calculate the %Na2CO4 in the sample. a. 93.36% b. 14.59% c. 12.75% d. 23.41%3. A 0.1510 g KHP (MW = 204.22 g/mol) sample required a volume of 57.04 mL of NaOH solution to reach a phenolphthalein end point. Calculate the molarity of NaOH titrant. a. 0.02593 M b. 0.006481 M c. 0.01296 M d. 0.01012 M
a) 1.4g b) 4.5g c) 0.025g d) 5.6g . B) Molarity (5g) of NaOH dissolved in 120 ml of solution the molar is : a) 0.75M b) 1. 04M c) 1.25M d) 0.5M 9) How many grams of AlCl3 (s) Should be dissolved, to prepare 1 liter of a solutio: in which the concentration of Cl (ao) ions 0.6M? Activate Windows Go to Settings to activate Windo Page 2 of 2 English (United States) ENG 7:23 P P Type here to search 36°C AG A 40 INTL 10/5/202Z end insert home f8 E f12 delete SC f2 f3 f4 f5 f6 f7 f9 f10 f11 f1 backspace
c. ions precipitate d. ions recombine with the salt crystal kas don 15. True/False: Some dissolved ions can recombine with the crystal. 16. True/False: More NaCl can dissolve if more water is added to the solution. 17. Define the following terms: a. recrystallization b. saturated solution ments
a Ingilizce v An AGNO3 solution with NaCl equivalent of 5,972 mg / ml is used as a titrant in volumetric analysis. a) Find the normality of this solution. b) 0,2158 g NaCl for example 31,47 ml consumption in titration with AGNO3 with normality in a Calculate the amount and percentage of chloride in the sample (Na 23 g/mol, Cl: 35.5 g/ mol)
64. What does the "p" in "pKsp" refer to? Give a simple example. 65. Is the ocean over-saturated, under-saturated, or saturated with respect to calcium carbonate? Give an equation for and explain how it is used in oceanography, and why is important to marine life. What's going to happen as the ocean warms?
2. Why is it necessary to rinse the burette with a few mililitres of the sodium hydroxide solution used in the titration before filling it with this solution? It is necessary to rinse the burette with a few militres of the sodium hydroxide solution used in the titration before filling it with this solution becuase any tiny amounts of liquid remaining are the same as the solution used to fill the burette, so they will not change the concentration of the solution in any way. Moreover this process helps to prevent contamination from the remaining traces of water. 4. When using phenolpthalein indicator in a titration, why is it necessary to have the sodium hydroxide solution in the burette, rather than in the Erlenmeyer flask? When using phenolpthalein indicator in a titration, It is necessary to have the sodium hydroxide solution in the burette, rather than in the erlenmeyer flask becuase it is easy to observe the color change from colorless to pink. On the other hand, if HCI is taken in…