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Water — Flashcards

ICSE · Class 9 · Chemistry

36 flashcards for Water (ICSE Class 9 Chemistry) to test yourself on key terms and facts. Sample: "What is water? Give its formula, chemical"

43 questions36 flashcards10 formulas & key relations5 concepts

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A diagram illustrating the arrangement and movement of particles in solid, liquid, and gaseous states of matter.
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36 Flashcards·
Water basicsWater as solventSolutionsConcentration of solutions
Card 1Water basics

What is water? Give its formula, chemical name, and molecular mass.

Answer

Water is H2O. Chemical name: Dihydrogen oxide. Molecular mass: 18 amu.

Card 2Water as solvent

Why is water called a universal solvent?

Answer

Water has a high dielectric constant, so it reduces the attraction between positive and negative ions and dissolves many substances. It dissolves solids, gases, and some liquids, so it is called the u…

Card 3Solutions

What is the difference between solute and solvent?

Answer

Solute: the substance that dissolves. Solvent: the medium that dissolves the solute and forms the solution. Example: In salt solution, salt is the solute and water is the solvent.

Card 4Solutions

What is a saturated solution?

Answer

A saturated solution cannot dissolve any more solute at a given temperature.

Card 5Solutions

What is a supersaturated solution?

Answer

A supersaturated solution holds more solute than it can theoretically hold at room temperature.

Card 6Concentration of solutions

How is concentration of a solution expressed by mass percent?

Answer

Concentration of solution = (Mass of solute / Mass of solution (solute + solvent)) × 100. Masses are taken in grams.

Card 7Concentration of solutions

Calculate the mass percent when 10 g of sodium chloride is dissolved in 90 g of water.

Answer

Mass of solute = 10 g. Mass of solvent = 90 g. Mass of solution = 10 g + 90 g = 100 g. Mass percent = (10 / 100) × 100 = 10%.

Card 8Concentration of solutions

How is volume percent calculated?

Answer

Volume percent = (Volume of solute / (Volume of solute + Volume of solvent)) × 100. Volumes are taken in mL or litres in the same unit.

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Frequently Asked Questions

What are the important topics in Water for ICSE Class 9 Chemistry?
Key topics in Water include Water: Basic Facts and Physical Properties, Water as a Universal Solvent and Solutions, Solubility, Concentration, and Solubility Curves, Crystals, Hydrated and Anhydrous Substances. Study these first, then practise questions on each for Class 9 exams.
How many flashcards are available for Water?
There are 36 flashcards for Water covering key definitions, facts and ideas. A few sample cards are shown on this page.
How should I revise Water for Class 9 exams?
Learn the core ideas first, then work through the 43 practice questions on Water. Revise definitions regularly and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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