A water sample (pH=7.8) contains 94mg/L of calcium, 28mg/L of magnesium, 14mg/L of sodium and 31mg/L of potassium. What is the total hardness (TH) in (a) meq/L and (b) mg/L as CaCO3. Besides, what is the alkalinity of sample if presence of 135mg/L HCO₂ and 134mg/L of SO (Given: MW of Ca=40, K-39.1, S-32, Mg-24.3, Na-23, 0-16, C=12, H=1)

A water sample (pH=7.8) contains 94mg/L of calcium, 28mg/L of magnesium, 14mg/L of sodium and 31mg/L of potassium. What is the total hardness (TH) in (a) meq/L and (b) mg/L as CaCO3. Besides, what is the alkalinity of sample if presence of 135mg/L HCO₂ and 134mg/L of SO (Given: MW of Ca=40, K-39.1, S-32, Mg-24.3, Na-23, 0-16, C=12, H=1)

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

Similar questions

27) If the 145 mL of a 0.0078 mol/L solution of CUNO3, was mixed with 195 mL of a 1.48 · 10-1mol/L solution of KI, would a precipitate form? Calculate the ion product (Q) for the potential precipitate. The Ksp of CuI is 1· 10-12.
What is the pH of a 1.0 L solution that is 0.50 M PO43- and 0.50 M HPO42-? (The pKa values for H3PO4are: 2.14, 7.2, and 12.4 respectively) If 0.01 moles of OH- is added to the above buffer, what will the new pH be? Change of volume is negligible. If 0.01 moles of OH- is added to 1.0 L of water, what will the new pH be? Change of volume is negligible.
A Water sample has an alkalinity of 300 mg/L as CaCO3. Calculate the concentrations of alkalinity species (H*, OH", H2CO3, HCO;", and CO;²) for the following cases: (i) The pH is 4.0, (ii) The pH is 7.0, and (iii) The pH is 10.
Pls ans all
What are the respective concentrations (M) of Cu2+ and Br– afforded by dissolving 0.150 mol CuBr2 in water and diluting to 500. mL?
Question 3 Determine which of the given salt solutions would have greater ion-pair formation. Recall that high concentrations, high charge magnitude, and small ion size favor ion-pair formation. (a) 1.0 M NaCl vs 1.0 M MgCl, [Select] (b) 0.05 M LiF vs 0.05 M KBr [Select] (c) 1.5 M KNO3 vs 0.0001 M CaSO4 [ Select] (d) 0.25 M BaCl2 vs 0.25 M Na»S [Select]
The analysis of a water is as follows Ca+ 78 20 Specie [mg/L] Alkalinity SO,2- CH pH 96 8.1 282 Na+ 106 K+ Mg2+ 30 126 12 Draw a meq/L bar graph (a) (b) Determine the Calcium carbonate and non-carbonate hardness in meq/L. (c) Determine the Magnesium carbonate and non-carbonate hardness, in meq/L. ca-NCH, Mng-eH mg-NCH. ull Ca- CH
Write the charge balance and material balance(s) that are needed to determine the equilibrium solution composition for each of the following aqueous solutions: (a) 10-3 M benzoic acid (b) 10-3 M Na2S (c) 10-3 M (NH4)2CO3 (d) 10-3 M (NH4)2CO3 plus 5 × 10-3 M (NH4)3PO4 plus 10-3 M CaCO3
A 0.098 M K2Cr2O7 titrant was used for titration of 30 mL of aqueous Ethanol (C2H6O) solution and consumed 41.40 mL. (a) Calculate the mass of Ethanol and (b) determine degree proof of ethanol (density of pure ethanol= 0.789 g/mL).
6
Given the following hydrolysis constants, which of the salts has the weakest parent ACID? K₂ or K, for salt 3.3 x 10-7 5.6 x 10-10 5.6 x 10-10 5.0 x 10-6 (A) (B) (C) (D) SALT NaClO2 NH4NO3 C₂H302 C₂H5NHBr NaCN A E B 2.5 x 10-5.
A 15.00 ml aliquot of a 0.75 M solution of a weak acid (K, = 1.00E-05 at 25°C) is titrated with 0.500 M NaOH. Determine the pH at the following volumes of NaOH: Volume NaOH = 15.00mL pH = Volume NaOH = 22.50mL pH = Volume NaOH = 27.50mL pH =