मराठी

During an experiment the students were asked to prepare a 10% (Mass/Mass) solution of sugar in water. Ramesh dissolved 10g of sugar in 100g of water while Sarika prepared it by dissolving 10g of - Science

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प्रश्न

During an experiment, the students were asked to prepare a 10% (Mass/Mass) solution of sugar in water. Ramesh dissolved 10g of sugar in 100g of water while Sarika prepared it by dissolving 10g of sugar in water to make 100g of the solution.

(a) Are the two solutions of the same concentration

(b) Compare the mass % of the two solutions.

थोडक्यात उत्तर

उत्तर

(a) No, Sarika has a higher mass percentage.

(b) Solution made by Ramesh

Mass % = `10/(10 + 100) xx 100`

= `10/110 xx 100`

= 9.09%

Solution made by Sarika -

Mass % = `10/100 xx 100`

= 10%

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पाठ 2: Is Matter Around Us Pure - Long Answer Questions [पृष्ठ १८]

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एनसीईआरटी एक्झांप्लर Science [English] Class 9
पाठ 2 Is Matter Around Us Pure
Long Answer Questions | Q 39. | पृष्ठ १८

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संबंधित प्रश्‍न

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Pragya tested the solubility of three different substances at different temperatures and collected the data as given below (results are given in the following table, as grams of substance dissolved in 100 grams of water to form a saturated solution).

Substance dissolved Temperature in K
283 293 313 333 353
  Solubility
Potassium nitrate 21 32 62 106 167
Sodium chloride 36 36 36 37 37
Potassium chloride 35 35 40 46 54
Ammonium chloride 24 37 41 55 66
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  4. What is the effect of change of temperature on the solubility of a salt?

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