If equal moles of water and urea are taken in a vessel what will be the mass percentage of urea

If equal moles of water and urea are taken in a vessel what...

Key Concepts

Mole Concept

This concept deals with the idea that the amount of a substance is given in moles, which is a count of entities (atoms, molecules, etc.) rather than mass. It establishes a fixed number of particles per mole and is essential for converting between the number of molecules and the mass of a substance using the substance's molar mass.

Molar Mass

Molar mass is the mass of one mole of a substance and acts as a conversion factor between the mass of a substance and the number of moles. In problems involving mixtures or chemical calculations, knowing the molar masses of the individual components allows one to determine the mass contributions from given mole quantities.

Mass Percentage Composition

Mass percentage composition is a measure of the concentration of a component in a mixture, defined as the mass of the component divided by the total mass of the mixture, multiplied by 100. It is widely used to express the proportions of substances in a solution by mass, which requires converting moles to grams using the molar mass followed by the ratio calculation.

Transcript

00:01 We have a given problem is here problem 55 which is if equal modes of water in urea are taken in a vessel what will be the mass percentage of urea in the solution so here we have to find here mass percentage of urea mass percentage of urea mass percentage of urea in a solution which is unknown and here we have equal moles of water and urea so it means we have equal moles of equal moles of urea moles of urea is equal to moles of water h2o so that will be equal to x so it is equal mass of urea and the mass of water is equal so we will represent by x and now we will find here mass of urea mass of urea urea is equal to we have mass of urea is 60 x and mass of water mass of water which is equal to 18 x so here we will find malls moles is equal to given mass divided by molar mass which is equal to we have here first we will define total mass total mass of total mass of urea in water here we will add the mass of urea urea and water so which is equal to here 60 x plus 10x which is equal to we have sorry 18x which is equal to here 78x this is total mass of urea and water so solution mean solution urine water solution total mass is here total mass is 78 x so now we will find now we will find here we will find here we have unknown value is here mass percentage of urea so here we will find mass percentage of mass percentage of urea which is equal to mass of urea divided by mass of solution mass of solution and percentage means into hundred which is equal to we have we know that mass of urea is 60x and mass of solution is 78 x and mass of water plus mass of urea and mass of all solution will be 78 x so that is equal to we have here here is equal to 78 .92 percent so much mass percentage of urea in solution is mass percentage of urea in solution is mass percent of percentage of urea in a solution which is equal to 78 .92 percent so here we have here no correct option so here have the correct option here is 78 .92%...

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