Some Basic Concepts of Chemistry questions
951 published questions with worked solutions.
- What is the total number of moles of H_2SO_4 required to prepare 5.0 L of a 2.0 M solution of H_2SO_4 ?
- Glucose solution is 25% by weight of solution. Its per cent concentration by weight of solvent is
- 25.3 g of sodium carbonate, Na_2CO_3 is dissolved in enough water to make 250 mL of solution. If sodium carbonate dissociates...
- A mixture of ethane and ethene occupies 41 L at 1 atm and 500 K. The mixture reacts completely with 10 3 mole of O_2 to produce...
- 4.0 g of NaOH is dissolved in 100 mL solution. The normality of the solution is
- Calculate the mass of urea ( NH_2CONH_2 ) required in making 2.5 kg of 0.25 molal aqueous solution.
- The molarity of a solution containing 5.0 g of NaOH in 250 mL solution is
- A mixture has 18 g water and 414 g ethanol. The mole fraction of water in mixture is (assume ideal behaviour of the mixture)
- Molarity of a given orthophosphoric acid solution is 3M. Its normality is
- 5 L of a solution contains 25 mg of CaCO_3 . What is its concentration in ppm? (Mol. wt. of CaCO_3 is 100)
- The density (in g ,mL^ -1 ) of a 3.60 M sulphuric acid solution that is 29% H_2SO_4 (molar mass = 98 g mol^ -1 ) by mass will be
- How many moles of Al_2(SO_4)_3 would be in 50 g of the substance?
- The density of a 3 M sodium thiosulphate ( Na_2S_2O_3 ) solution is 1.25 g/mL. Calculate the per cent by mass of sodium...
- A sample of sea water contains 5 10^ -3 g of dissolved oxygen in 1 kg of the sample. The concentration of O_2 in that sea water...
- 60 mL of N 5 H_2SO_4 , 10 mL of N 2 HNO_3 and 30 mL of N 10 HCl are mixed together. The strength of the resulting mixture is
- Concentrated aqueous sulphuric acid is 98% H_2SO_4 by mass and has a density of 1.80 g mL^ -1 . Volume of acid required to make 1...
- How many grams of H_2SO_4 is to be dissolved to prepare 200 mL aqueous solution having concentration of [ H_3O^+ ] ions is 1 M at...
- A solution of Al_2(SO_4)_3 (d = 1.253 gm/mL) contain 22% salt by weight. The molarity and molality of the solution are
- How many grams of concentrated nitric acid solution should be used to prepare 250 mL of 2.0 M HNO_3 ? The concentrated acid is...
- Concentrated nitric acid used in laboratory work is 68% nitric acid by mass in aqueous solution. What should be the molarity of...
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Alcohols, Phenols and EthersAldehydes, Ketones and Carboxylic AcidsAlternating CurrentAminesAnatomy of Flowering PlantsAncient Indian HistoryAnimal KingdomApplication of DerivativesArea Under CurveAromatic Compounds and Aryl HalidesAtomsBasic Mathematics and LogarithmBinomial TheoremBiodiversity and ConservationBiological ClassificationBiomoleculesBiotechnology and Its ApplicationsBiotechnology: Principles and ProcessesBody Fluids and CirculationBreathing and Exchange of GasesCell Cycle and Cell DivisionCell: The Unit of LifeChemical Bonding and Molecular StructureChemical Coordination and Integration