QI. 4 litres of water obtained from a borewell in Vellore contains FeSO4 = 30.4 mg; CaS0 = 13.6 mg; MgCl2 = 38 mg; Ca(HCO3)2 = 32.4 mg; Mg(HCO3)2 = 14.6 mg and NaCl = 11.7 mg. Calculate temporary, permanent and total hardness of the water sample in ppm. (Atomic masses of Fe = 56; Ca= 40; Mg = 24 and Na = %3D %3D %3D
Q: A solution is prepared by mixing 50.0 mL of 0.50 M Cu(NO3)2 with 50.0 mL of 0.50 M CO(NO3)2- Solid…
A:
Q: What would the specific gravity of the solution likely be if 100 mg of NaCl is placed in 1 L of pure…
A: The specif gravity is defined as the ratio of the density of the object to the density of the…
Q: An analysis of city drinking water for total hardness was done by two students in the laboratory and…
A: The solution is given below -
Q: The density of a 2.25 M resolution with ethanol C2H5OH is measured at 0.977 g/mL. Calculate mass…
A: Here we have to determine the mass percentage of ethanol in the given solution.
Q: What will be the new boilng point of 297ml benzene (Kb = 2.53 °C-Kg/mol; Bp 80.1°C) when mixed with…
A:
Q: What are the principles behind caffeine being extracted from coffee using the above items?
A: Caffeine extraction from coffee
Q: Gypsum (CaSO4) is a common percipitant in water desalination. CaSO4 Ca2+ + SO42- where…
A: The provided reaction is- CaSO4(s) <=> Ca2+ + SO42- Provided Ksp= 10-4.6 Or, Ksp= 2.512…
Q: What are the criteria for a successful determination in gravimetric analysis?
A: Gravimetric analysis is a technique through which the amount of an analyte (the ion being analyzed)…
Q: A pharmacist needs 250 mL of 80% v/v alcohol to macerate a dried sample weighing 100 grams. If the…
A: Given : Desired concentration (% (v/v)) of alcohol = 80 % Volume of solution required = 250 mL And…
Q: Calculate the amount of temporary and permanent hardness of a water sample in units of Degree…
A: We have to find the temporary and permanent hardness of a water sample in units of Degree Clarke’s,…
Q: The separation and purification processes given below and the method used against them are given.…
A: The process in which the separation of components from the mixture of liquid by using the…
Q: What is the minimum distribution constant that permits removal of 99% of a solute from 50.0 mL of…
A: What is the minimum distribution constant that permits removal of 99% of a solute from 50.0 mL of…
Q: 4 litres of water obtained from a borewell in Vellore contains FeSO4 = 30.4 mg; CaSO4 = 13.6 mg;…
A:
Q: Calculate the final percent concentration of the erythrocytes in each well: (NaCl, CaCl2, MgCl2)…
A: Erythrocyte concentration is 10%. Concentration of each compound = 0.25 M
Q: The partial molar volumes of acetone and chloroform, in a solution in which the molar fraction of…
A:
Q: * Module 3: In his experiment, Mashiho wanted to determine the molar mass of his unknown sample.…
A:
Q: 1. In this method, the mass of the analyte or a compound derived from the analyte is determined. 2.…
A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…
Q: What volume of dilute nitric acid of density 1.11g/mL and 19% nitric acid by weight contains in 10g…
A: Given: density of nitric acid =1.11g/ml With this information, we will first calculate the volume…
Q: Jack who weighs 68 kg is 45 years old and has severe hypomagnesaemia. He requires 0.26 g/kg of…
A: Given the body weight = 68 Kg Total mass of MgSO4.7H2O required = 0.26 gKg * 68 Kg = 17.68 g
Q: A solution of 75 mM tartaric acid (CaH,O6) in water is used as a standard in HPLC analysis. How many…
A: We know that 1 molar solution stands for 1 mole solute is dissolved in 1 litre solution. Now, we…
Q: The molar conductivities at infinite dilution of aqueous solutions of NH4Cl, NaCl, and NaOH are,…
A:
Q: (Preparation of 0.1 N HCI solution in 250 ml D.W) Procedure: Preparation of approximately (0.IN) HCI…
A: The question deals with concepts of solution preparation. normality is a method of expressing…
Q: 3. It is used to convert the known weight of the precipitate to the corresponding weight of the…
A: ppm is an abbreviation used for parts per million.
Q: .columns with one million theoretical plates operating by slip flow. The figure shows the gradient…
A: Column chromatography is a separation technique that is widely used for the identification and…
Q: Suppose that a volume of 5.0 cm³ of acetic anhydride (density = 1.08 g·cm⁻³, molar mass = 102.087…
A:
Q: Explain why it is incorrect to collect data for temperatures above 100 C in terms of the solute to…
A: A question based on calibration method that is to be accomplished.
Q: Indicate which of the two filtration techniques, gravity ( G ) or vacuum ( V ), is suitable for each…
A: Given operations are a) Hot filtration b) Removal of decolourising carbon c) Isolation of…
Q: What volume of 2 M Tris-HCl, pH 8.0 (in microliters) will you need in order to make 10 mL of 10 mM…
A:
Q: Calculate the molar concentration of the nitric acid if you know that specific gravity is 1.42 and…
A: Given, Specific gravity = 1.42 , Solution concentration = 0.4 M volume of water = 100 ml
Q: Based on the following molarities obtained,1.00 x10^-1 , 1.04 x10^-1 and 1.0 2x10^-1. fine the…
A: First the average molarity from given 3 values is calculated by adding those values and dividing it…
Q: in a chromatographic analysis of water from a drinking fountain gives area of 1.56*10^4, 5.12*10^4,…
A: In the given problem from the cromatographic analysis of water we need to determine the…
Q: The distribution coefficient, KD (ether/water), between ether and water for aspirin at room…
A:
Q: With KD = 3.5, in a solution of 10 grams of aspirin in 80 mL of ether using two separate extractions…
A: A mixture is a type of matter which is composed of two or more substances. These are called…
Q: Temperature - distillate volume plot for fractional distillation of benzene (b. pt. 80°C) and…
A: Boiling point of benzene = 80◦ c Boiling point of toluene = 110◦ c
Q: Hypothetical solubility data for compound A. Solubility in Boiling Solvent 0.3 g/100 mL 10 g/100 mL…
A: As solution has two main components, one is solute and other is solvent. That component which is…
Q: The results of a water analysis are calcium 29.0 mg/l, magnesium 16.4 mg/l, sodium 23.0 mg/,…
A: mg/L concentration is to be converted to meq/L.
Q: The partial molar volumes of water and ethanol in a solution with xH2O=0.45 at 25 ∘C are 17.0 and…
A: In a mixture containing two miscible liquids, the partial molar volume refers to the contribution…
Q: The distribution coefficient, KD (C ether/C water), between ether and water for aspirin at room…
A: Distribution coefficient is the ratio of concentration of solute in organic phase to the…
Q: An impure sample of 250 mg of adipic acid was recrystallized from 2.0 mL of boiling water. The…
A: The solubility of adipic acid at zero degree centigrade is 0.3 g of adipic acid required 100 mL of…
Q: Calculate the temporary and permanent hardness of water sample containing Mg(HCO3)2= 7.3mg/L,…
A: Given data: Amount of the hardness causing salts (mg/L) is given: Mg(HCO3)2 =7.3 mg/L Ca(HCO3)2 =…
Q: How do you prepare 250 ml 0.05 M CuCl2 solution from 0.1 M CuCl2 stock solution? Lütfen birini…
A: Given that: volume of CuCl2 V1 = 250 mL molarity of CuCl2 M1 = 0.05 M molarity of CuCl2 stock…
Q: 8. Ethanol is miscible with water. (After all, alcoholic beverages don t separate into an “alcohol‟…
A: The question asks whether ethanol can be used as the extraction solvent or not for the purpose of…
Q: An open tubular column with a diameter of 215 µm and a stationary phase thickness on the inner wall…
A: Given:- diameter of open tubular column = 215 μm Unretained solute…
Q: The solubility of suberic acid C6H12(COOH)2 is 0.14 g/100 ml H2O and 0.56g/100 ml ethyl ether at 15…
A:
Q: (Concentration) You are tasked to prepare 50.000 ppm of a caffeine standard for an analysis. If you…
A: ppm concentration is defined as: ppm=Mass of solute (in grams)Volume of solution (mL)×106 ----(1)
Q: Temperature - distillate volume plot for fractional distillation of benzene (b. pt. 80°C) and…
A: When temperature becomes above than that of the boiling point, then that particular liquid start…
Q: Calculate the mass fraction and weight percent of each in the following mixture. 25.0 g CCl4 and…
A: The answer to both the questions can be calculated as follows -
Q: One gram of caffeine dissolves in 55 ml of water, 7 ml of dichloromethane (DCM), 530 ml of diethyl…
A: The solubility of a compound in a solvent depends on the type of compound and the solvent. Polar…
Step by step
Solved in 3 steps with 3 images
- 4 litres of water obtained from a borewell in Vellore contains FeSO4 = 30.4 mg; CaSO4 = 13.6 mg; MgCl2 = 38 mg; Ca(HCO3)2 = 32.4 mg; Mg(HCO3)2 = 14.6 mg and NaCl = 11.7 mg. Calculate temporary, permanent and total hardness of the water sample in ppm. (Atomic masses of Fe = 56; Ca = 40; Mg = 24 and Na = 23)Calculate the temporary and permanent hardness of water sample containing Mg(HCO3)2= 7.3mg/L, Ca(HCO3)2= 16.2mg/L, MgC12= 9.5mg/L, CaSO4=13.6mg/L).19 g of unknown organic sample was dissolve in 640 mL of Dicloromethane (DCM). The boiling point of benzene was increased by 3.78oC. Determine the molecular weight of the unknown sample? Kb of DCM = 2.42oC/m Bb of benzene = 39.6 oC density of benzene = 1.33 g/mL at 25 °C Round your answer to the nearest whole number, no units required.
- 4) Given the following analyses of groundwater (reported as mg/L): Ca²+ = 16.5; Mg2+ = 3.1; Na = 13; K+ = 2.6; (bicarbonate) HCO3 = 67; SO4² = 18; Cl = 5.9, and SiO₂ (uncharged species) = 35 a. Calculate the analytical error of this set of analyses. b. Calculate the total dissolved solids (TDS) of the solution (sum concentration as mg/L for all species)?Calculate the quantity of lime and soda required for softening one million litre of the following sample of water. If the purities of lime and soda are 80% and 85% respectively. The impurities are Silica mg/lit. CaSO4 = 68 mg/lit. MgCO3 = 884 mg/lit. CaCO3 = 120 mg/lit. 75 mg/lit. MgCl2 = 19 mg/lit. MgSO4 = 30 %3D %3DCalculate the OP and FP of an aqueous solution containing 15 grains of ferrous sulfate in 10mL glycerin at 20 degrees Celcius, glycerin boils at 290 degrees Celcius and freezes at -38 degrees Celcius. Specific gravity of solution= 1.89. Specific gravity of solvent= 1.26. Molar Mass of Solute= 151.91 g/mol. Assume that Glycerin has Kb value of 2.15 and Kf of 3.20. Kindly type in your final answers and upload your computation process. Please use the following constant values if needed in the problem. Temperature = 278.15 K R (gas constant) = 0.082057 L atm/mol-1K-1
- Calculate the solubility of CuCO3 in water at 25C. Ksp = 3.00x10-12. Round the answer to two significant figures.Analysis of a given water sample gave the following results: Ca(HCO3)2 = 40.5 ppm, Mg(HCO3)2 = 36.5 ppm, MgSO4= 30 ppm, CaSO4 = 34 ppm, CaCl₂ = 27.75 ppm and NaCl = 10 ppm. a) Give values of temporary and permanent hardness in ppm CaCO3 equivalent and ° Clark. b) Calculate the amount of lime and soda used for softening 20,000 L of water. Given purity of lime is 84% and purity of soda is 92%. c) Calculate the volume of 0.01 (M) EDTA required to titrate 10 mL of same water sample using EBT as indicator. d) The hardness of 15,000 L of above water sample was completely removed by passing it through a zeolite softener. The zeolite softener required 100 L of NaCl solution for regeneration. Calculate the concentration of the NaCl solution.Calculate the amount of lime and soda required to soften 25000 litres of water having following analysis Ca(HCO3)2 = 4.86 ppm; Mg(HCO3)2 = 7.3 ppm; CaSO4 =6.8 ppm; MgCl2 = 5.7 ppm; MgSO4 = 9.0 ppm; SiO2 = 3.5 ppm; NaCl = 5.85 ppm.
- Calculate the temporary hardness, permanent and total hardness of the sample of water from the following results. Also indicate if the sample is Permanent or Temporary. H=1, C=12, 0=16, N=14, Mg = 24, K = 39, Cl=35.3, Ca= 40,S=32, Na =23 If the sample is Permeant use P Temporary T Neither permeant nor temporary use X Blank 1 Blank 3 Blank 5 Blank 7 Sample M₂CO3 Nacl CaCO3 Ca(NO3)2 CaCl₂ KSO4 Mg(NO3)2 MgCl, MgSO4 Blank 9 Blank 11 Blank 13 Blank 15 Blank 17 Blank 19 Total permanent hardness? Total Temporary hardness? Total Hardness? Mg/1 30.2 12.5 42 55.5 22.8 12 60 32 45 Mg(HCO3)2 38 Molecular weight Hardness 85 58.3 100 164 110.6 135 148 94.6 120 146 Blank 2 Blank 4 Blank 6 Blank 8 Blank 10 Blank 12 Blank 14 Blank 16 Blank 18 Blank 20 Blank 21 Blank 22Use the following atomic masses (in g/mol): As = 74.92; O = 16; K = 39.1; Cr = 52; Na = 23; Cl = 35.45; Ba = 137.33; S = 32.06, What is the normality of I2 solution where 35mL of it was found to be equivalent to 175.34mg of As2O3?Solute S has a distribution constant of 5.1 between water (phase 1) and hexane (phase 2). A 71.0 mL solution of S in water is extracted three times with 12.0 mL of hexane. Calculate the fraction of S remaining in the aqueous phase. fraction remaining: 0.0575 Incorrect