(a)
Interpretation:
The number of moles of hydrogen gas evolved needs to be determined when 1.385 g of an unknown metal is reacted with an excess of HCl to evolve the gas with a volume of 382.6 mL at 20.0°C and 755 mmHg pressure.
Concept introduction:
Solution stoichiometry involves the calculation of the concentration of solutions in the given conditions of volumes, moles, etc. There are various ways to calculate the concentration of solutions such as molarity, molality, mole fraction, ppm, ppb etc. Mole fraction is the ratio of moles of substance and total moles in the solution or mixture. One ppm stands for part per million or milligrams per liter (mg/L) whereas parts per billion (ppb) is one part in 1 billion.
Molarity represents the moles of solute dissolved in per liter of solution. The mathematical expression of molarity is:
(b)
Interpretation:
The mass of
Concept introduction:
From the number of moles and molar mass, the mass of substance can be calculated as follows:
Here, n is number of moles and M is molar mass.
(c)
Interpretation:
The molality of particles of
Concept introduction:
Molality represents the moles of solute dissolve in per kg of solvent. The mathematical expression of molality is:
From freezing point depression, the molality can be determined using the following relation:
(d)
Interpretation:
The number of moles of ions present in solution of
Concept introduction:
Solution stoichiometry involves the calculation of the concentration of solutions in the given conditions of volumes, moles, etc. There are various ways to calculate the concentration of solutions such as molarity, molality, mole fraction, ppm, ppb etc. Mole fraction is the ratio of moles of substance and total moles in the solution or mixture. One ppm stands for part per million or milligrams per liter (mg/L) whereas parts per billion (ppb) is one part in 1 billion.
Molarity represents the moles of solute dissolved in per liter of solution. The mathematical expression of molarity is:
(e)
Interpretation:
The formula and molecular weight of
Concept introduction:
Solution stoichiometry involves the calculation of the concentration of solutions in the given conditions of volumes, moles, etc. There are various ways to calculate the concentration of solutions such as molarity, molality, mole fraction, ppm, ppb etc. Mole fraction is the ratio of moles of substance and total moles in the solution or mixture. One ppm stands for part per million or milligrams per liter (mg/L) whereas parts per billion (ppb) is one part in 1 billion.
Molarity represents the moles of solute dissolved in per liter of solution. The mathematical expression of molarity is:
(f)
Interpretation:
The metal M in
Concept introduction:
Solution stoichiometry involves the calculation of the concentration of solutions in the given conditions of volumes, moles, etc. There are various ways to calculate the concentration of solutions such as molarity, molality, mole fraction, ppm, ppb etc. Mole fraction is the ratio of moles of substance and total moles in the solution or mixture. One ppm stands for part per million or milligrams per liter (mg/L) whereas parts per billion (ppb) is one part in 1 billion.
Molarity represents the moles of solute dissolved in per liter of solution. The mathematical expression of molarity is:
Trending nowThis is a popular solution!
Chapter 13 Solutions
CHEMISTRY-TEXT
- List and describe two methods that can used to improve the separation of a liquid mixture by fractional distillationarrow_forward(a) Interpret the variation, including the overall trend across the 3d series, of the following values of hydration enthalpies (in kJ mol·'). [Ca(H2O)«]²*: -2468; [Ti(H2O)«J*: -2700; [V(H2O)«]**: -2814; [Mn(H2O)6]**: -2743; [Fe(H2O)«]²+: -2843; [Co(H20)6]**: -2904; [Ni(H2O)c]*: -2986. (b) By making use of LFSE (Ligand field stabilization energy) in tetrahedral and octahedral geometries, predict whether hausmannite mineral (Mn3O4) has a normal spinel or inverse spinel structure. Describe the structure of the mineral in detail.arrow_forward(b) The distribution ratio for X between n-hexane and water is 8.9. Calculate the concentration of X remaining in the aqueous phase after 50.0 mL of 0.200 M X is treated by extraction with the following quantities of n-hexane?arrow_forward
- (11) Calculate the mole fraction of the total ions in an aqueous solution prepared by dissolving 0.400 moles of CaF2 in 850.0 g of water. A) 0.00841 B) 0.0270 C) 0.00900 D) 0.0248 E) 0.0167arrow_forwardс. D. = Е. О ..... HI (2 eq.) Solvent HCOO ОН Br + ОН "Brarrow_forwardWhat weight of the soda ash (impure Na2CO3) should be taken for analysis in order that the number of milliliters of 0.500 N acid used will be equal to one-half of the percentage of Na2CO3 in the sample? Note: Present complete solutions for the following problems.arrow_forward
- A K2SO4 solution is prepared by weighing out a certain amount of the pure solid reagent,dissolving it to 500.0 mL in a volumetric flask. An aliquot was taken from this solution.of 25.00 ml and diluted to 500.0 ml. An aliquot of 5.00 was taken from this new solution anddiluted to 50.00 ml. A chemical analysis of this new solution showed a 0.100%(w/v)in K+. Calculate the weight of the pure solid K2SO4 used for the preparation of the original solution.and its concentration in each volumetric flask. The answer is 2.23x10^2garrow_forwardDescribe the preparation of 800 mL of 2 M HCl from the commercial reagent that is 37.5% HCl (%w/w) and and has density of 1.17g/mL.arrow_forward2 A mixture is first made of 240 cm3 of a 0.412 mol.dm–3 solution of silver nitrate and y cm3 of a 2.00 mol.dm–3 solution of ammonia. Thereafter, 280 cm3 of a 0.0116 mol.dm─3 solution of sodium chloride is added to this mixture and the resulting solution is diluted to 2.50 dm3 . Calculate the value of y that will just prevent the precipitation of silver chloride.arrow_forward
- Calculate the saturation indices of the solutions described below and classify each as undersaturated, supersaturated, or in equilibrium. Saturation state with respect to: Anhydrite (CaSO4) [Ca2+] = 0.00002 mM [SO42-] = 25 mM “Amakinite” (Fe(OH)2) [Fe2+] = 0.1 mM; [OH-] = 0.0001 mM Siderite (FeCO3) [Fe2+] = 3 mM; [CO32-] = 10 mMarrow_forwardDescribe the preparation of the solution. Show pertinent calculations.1.) 50 mL of 0.5 N HCl from 37% by wt. HCl (density=1.19 g/mL)arrow_forwardDraw a schematic diagram using this information. Preparation of the solution Take about 25-30 ml of distilled water in a beaker and add powdered crude copper sulphate while stirring the solution so that the powder dissolves. Keep adding the powdered sample till a little of it remains undissolved, even if it is stirred thoroughly. Now add 2-3 ml of dil. H2SO4 to make the solution clear. This prevents the hydrolysis of copper sulphate. Filtration of the solution Take a funnel and fix a filter paper in it and clamp it to a stand. Place a china dish under the funnel. The stem of the funnel should touch the wall of the china dish to avoid the solution splashing out. Pour the solution into the funnel over a glass rod and collect the filtrate in a china dish. The insoluble impurities are left in the filter paper as residue. Concentration of the filtrate to crystallisation point Heat the china dish on a sand bath till the solution is reduced to about one-third of its original volume. To…arrow_forward
- ChemistryChemistryISBN:9781305957404Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCostePublisher:Cengage LearningChemistryChemistryISBN:9781259911156Author:Raymond Chang Dr., Jason Overby ProfessorPublisher:McGraw-Hill EducationPrinciples of Instrumental AnalysisChemistryISBN:9781305577213Author:Douglas A. Skoog, F. James Holler, Stanley R. CrouchPublisher:Cengage Learning
- Organic ChemistryChemistryISBN:9780078021558Author:Janice Gorzynski Smith Dr.Publisher:McGraw-Hill EducationChemistry: Principles and ReactionsChemistryISBN:9781305079373Author:William L. Masterton, Cecile N. HurleyPublisher:Cengage LearningElementary Principles of Chemical Processes, Bind...ChemistryISBN:9781118431221Author:Richard M. Felder, Ronald W. Rousseau, Lisa G. BullardPublisher:WILEY