A water contains 180 mg/l Ca, 75mg/I Mg, 160 mg/l HCO3', and 150mg/l CO2, all expressed asCaCO3. Assume that water is to besoftened to a final Ca-hardness of 60mg/l as CaCO3, and a final Mg-hardness of 30 mg/l as CaCO3. Also,assume that the excess lime equals1 meq/l.MWCa40Mg24HCO361CO244CaCO3100Calculate the required amount oflime (in mg/l):Calculate the required amount oflime (in mg/l):

Total hardness TH = Ca in mg/L ×Eq. of CaCO3Eq. of Ca+ Mg in mg/L ×Eq. of CaCO3Eq. of Mg…

Answered: A water contains 180 mg/l Ca, 75 mg/l…

A water contains 180 mg/l Ca, 75 mg/l Mg, 160 mg/l HCO3', and 150 mg/l CO2, all expressed as CaCO3. Assume that water is to be softened to a final Ca-hardness of 60

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Related questions

Q: Calculating the boiling point of an aqueous solution 1. What is the boling point of a solution that…

A: Given: Number of moles=0.25 mole Solvent=1 Kg To find: Boiling point of water Solution: The formula…

Q: What is the freezing point depression when 15.52 g of Fe(NO3)3 (formula mass = 241.85 g/mol) is…

A: The question is based on the concept of solutions. depression in freezing point is a colligative…

Q: Eicosene is a molecular compound and nonelectrolyte with the empirical formula CH2. The freezing…

A: Given that: Depression in freezing point is 1.75°C Kf for benzene is 4.90°C/m Mass of eicosene…

Q: What is the freezing point depression constan

A: Depression in freezing point is the result of adding a solute to a solvent. When a substance starts…

Q: calculate the mass of copper(II) acetate monohydrate needed to prepare 100.0 mL of 0.1250 soluation…

A: As we know Molarity = mass/ molar mass * Volume(Lt)

Q: Consider the reaction of a 20.0 mL of 0.220 M C₅H₅NHCl (Ka = 5.9 x 10⁻⁶) with 12.0 mL of 0.219 M…

A: For the given reaction - the data provided is- Volume of C₅H₅NHCl = 20ml Molarity of C₅H₅NHCl =…

Q: What is the freezing point when 18.53 g of (NH4)3PO4 (formula mass = 148.97 g/mol) is dissolved in…

A: Freezing point of solvent is greater than freezing point of solutions

Q: Which solute is least soluble at 20 deg C?

A: In this question, we have the solubility curve of various chemical compound. The solubility curve…

Q: Which of the following has the largest equilibrium constant for hydration? CH3 a) CICH, b) `H…

A: When aldehyde are hydrated gem-diol are formed. These gem-diol are unstable in nature. The…

Q: Calculate the volume of concentrated HCl {which has a specific gravity of 1.18 and 35% (w/w))…

A: We will calculate concentration of concentrated HCl and then find its volume needed.

Q: The concentration of SO2 is 0.5 ppm. Calculate the equivalent concentration in μg/m^3 at standard…

A: Concentration of pollutants in air can be measured in unit of ppm or ppb

Q: Part 2 - Answer THREE of these. (a) What is the vapor pressure of water above the solution? (b) What…

A: Given that - Mass of non volatile solute = 8.3 g Molar mass of Solute = 68.51 g/mol Volume of the…

Q: A 10.0 mL sample of household ammonia solution required 25.10 mL of 0.245 M HNO3 for neutralization.…

A: Formula used: Molarity = 103* no of mole / V in L So number of mole = MV V = Volume So the…

Q: 9. Using pure water, 1.0 M NACI, and 1.0 M CaCl,: a) List the substances in decreasing melting point…

Q: An ethanol solution is 13.0%(v/v) alcohol. Assuming that distilling the solution can completely…

A: Percentage by Volume is a concentration term which defines the percent volume of solute present in a…

Q: 14- How many milliliters of concentrated hydrochloric acid, 38.0% (wt/wt), specific gravity 1.19,…

Q: In standardizing a solution of NaOH against 1.431g of KHC8H4O4, the analyst uses 35.50 mL of the…

A: A question based on concentration terms that is to be accomplished.

Q: 16. Consider two statements and state whether they are true or false: (1) If the enthalpy of…

A: Solvation depends on the solvation energy i.e. the change in Gibbs free energy, which expressed as…

Q: A salt having a formula of the type M₂X3 has Ksp = 6.4 x 10-20. Another salt, M₂X, has to have what…

A: we have to calculate the solubility product for M2X

Q: 1.86 g of unknown C were dissolved in 8.00 ml of water in a large test tube. The test tube was…

A: Colligative properties: The colligative properties are those properties of solutions that depend on…

Q: A solution was made by mixing 6.25 g of heptane (C7H63, molar mass = 100.21 g/mol) with 46.2 g of…

Q: How would you prepare 0.20 M CuSO4 100ml stock solution, if you have CuSO4 (cupric sulfate) as…

A: Problems on Molarity:

Q: The freezing point of a 0.100 M acetic acid (CH3COOH) solution is determined to be -0.1878 C.…

A: A numerical problem based on percent dissociation, which is to be accomplished.

Q: Calculate the freezing point of a solution made by adding 16.43 g of a nonelectrolyte (125.5 g/mol)…

A: Molality is the number of solvent moles per kilogram.Molality is also known as molal concentration.…

Q: A solution contains 0.625 g Ca2+0.625 g Ca2+ in enough water to make a 1825 mL1825 mL solution. What…

Q: Greg needs to determine the freezing point depression of 35 mL of 0.25 m AlCl3 solution. Greg…

A: The correct answer has to be given.

Q: If 1.205 g of KHP (204.22 g/mol) required 25.25mL of a sodium hydroxide solution for complete…

Q: 16) (6 points) You have a stock solution of 12M Hydrochloric Acid. How many mL of this solution…

A: To dilute a stock solution to make a diluted solution, you will need to know the concentration of…

Q: Assuming 100% dissociation, calculate the freezing point (T) and boiling point (T) of 1.91 m K3PO4…

Q: molarit

Q: QUESTION 5 Calculate the freezing point, in degrees Celsius, of a solution containing 51.6 grams of…

A: Depression in freezing point can be determined as below : ∆ Tf = Kf. m Where ∆ Tf = depression in…

Q: The freezing point of lauric acid was lowered by 1.68°C when a 3.706 g sample of a nondissociating…

A: Solution- The freezing point depression (ΔTf) is given by the formula: ΔTf = Kf × m × i where Kf is…

Q: What is the solubility of Cos (K= 5.9 x 10-21 at 25 °C) in g/100mL? %3D

A: The correct option is (D) 6.99×10-10 g/100ml

Q: Trail 1 volume vinegar, mL 4.00 mL g HC2H3O2 in sample taken 60.10 % HC2H3O2 (W/V) ?

A: Since % (w/V) is defined as % (w/V) = mass of solute taken in g X 100 / volume of solution taken…

Q: What is the percent (m/v) of a 200 mL saturated solution of ammonia chloride (NH4Cl) at 70oC?

A: The concentration of a substance can be measured in terms of mass by volume percentage. This…

Q: The solubility of an ionic compound M₂X3 is 3.6 10-17 g/L, and the molar mass is 188 g/mol.…

Q: 3) A solution is prepared at T = 20.0 °C by adding 50.00 of n-hexane (H = C6H14, MW = 86.18 g/mol)…

A: Given Data:Amount of Hexane =50.00 gAmount of n-octane =20.00 gVapor pressure of pure n-hexane…

Q: One particular pungent gas is the toxic hydrogen sulphide (H2S). Hydrogen sulphide develops an odour…

Q: 1.500 g of a non-dissociating compound is dissolved in 15.00 g of pure water (Kf= 1.86°C/m). The…

A: Calculation of Molar mass of the unknown compound: The mass of the unknown compound = 1.500 g The…

Q: An online study examined the lowering of freezing point when 0.222 g of an unknown molecular solute…

A: Mass of in known compound ,m = 0.222g Let the molar mass of compound be M g/mol. Then, number of…

Q: A student prepares a solution by dissolving 2.09 g of para-dichlorobenzene (C6H4Cl2,= 147.0 g/mol)…

Q: Average Water Hardness (mg CaCO, / ml water sample) Average Water Hardness (mg CaCO3 / L water…

A: Given the hardness of water sample (from three trials), average value can be calculated.

Q: What is the freezing point depression and boiling point elevation of the solution with acetic acid…

A: Given : Weight of Acetic acid = 200 grams Weight of water = 259 grams = 0.259 kg…

Question

A water contains 180 mg/l Ca, 75
mg/I Mg, 160 mg/l HCO3', and 150
mg/l CO2, all expressed as
CaCO3. Assume that water is to be
softened to a final Ca-hardness of 60
mg/l as CaCO3, and a final Mg-
hardness of 30 mg/l as CaCO3. Also,
assume that the excess lime equals
1 meq/l.
MW
Ca
40
Mg
24
HCO3
61
CO2
44
CaCO3
100
Calculate the required amount of
lime (in mg/l):
Calculate the required amount of
lime (in mg/l):

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 2 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.

Similar questions

For a solution containing 0.050 M sodium butanoate (the sodium salt of butanoic acid, butanoic acid can be found in appendix G). Calculate the fraction of association 0.011% 1.84% 5.25% 3.09% 0.008%
In what way these are different : (a) a sol and a gel (b) a gel and anemulsion.
What is the boiling point of a solution containing 0.80 g caffine C8H10N4O2, dissolved in 13.20 g benzene? The boiling point of pure benzene is 80.1oC and the boliling point elevation constant Kbp is 2.53oC/m.
0.263 g of an organic compound (a non-electrolyte) is dissolved in 20.0 g of cyclohexane (C6H12) and the solution freezes at 4.7oC. Pure cyclohexane has a freezing point at 6.5oC and a freezing point depression constant (Kf) of 20.5 oC/m. Calculate the molar mass of the organic compound. (A) 110 g/mol (B) 130 g/mol (C) 150 g/mol (D) 210 g/mol
Question 13 of 20 A 0.520 g sample of an unknown nonelectrolyte compound is dissolved in 4.07 g of lauric acid (Kf = 3.90 °C/m). The freezing point depression is determine to be 4.20 °C. What is the molar mass of the compound? | g/mol 2 C 8 9. x 100 +/- 3. 4. 7.
If a 250 mL solution of ethanol in water is prepared with 4 mL of absolute ethanol, what will be the concentration of ethanol in %v/v?
The freezing point of a solution that contains 1.1 g of an unknown compound, (A), dissolved in 12 g of benzene is found to be 2.97 °C. The freezing point of pure benzene is 5.48 °C. The freezing point depression constant of benzene is 5.12 °C/molal. What is the molecular weight of the unknown compound?
What is the freezing point depression constant of a solvent when a 1.50 m solution of NaCl causes a freezing point depression of 5.60 °C?
an acetic acid solution is 4.00M and has a density of 1.04g/mL. what is the mass/mass percent concentration of HC2H3O2(60.06 g/mol)? a ) 0.347% b) 0.375% c) 37.5% d) 23.1% e) 36.0 %
To prepare 200.0 mL of 0.01 M EDTA solution, how many grams of EDTA disodium salt dihydrate (C10H14N2Na2O8 · 2H2O) do you need?
Arrange these salts in order of increasing solubility at 50 degrees Celcius. AgCl: Ksp= 5.00000 x 10-9 PbCl2: Ksp= 1.68600 x 10-6 SrSO4: Ksp= 3.03342 x 10-23 Ag2CO3: Ksp= 2.00244 x 10-14 Sr(IO3)2: Ksp= 5.30534 x 10-15
Calculate the osmotic pressure of a 10 m/v% aqueous hemoglobin solution at 20 °C, if its molar mass is 68000 g/mol. What is the m/v% concentration of that calcium chloride solution which is isotonic with the above hemoglobin solution? (3,584 kPa; 5.44 · 10-3 %)