1)How will you prepare 10% of 150ml of sugar solution 2) 60g of NaCl is dissolved in water to - Science - Is Matter Around Us Pure

Question

1)How will you prepare 10% of 150ml of sugar solution?
2) 60g of NaCl is dissolved in water to obtain 400ml of salt
solution Find its concentration and the amount of water added?
3) 10% dilute base is prepared by taking 100ml of distilled water
Find the amount of HCl taken to prepare dilute base?
4)9g of water on electrolysing gives 1g of hydrogen and the rest
oxygen gas Find the mass of oxygen
5)In a reaction, 5 3g of Sodium carbonate reacted with 6g of
ethanoic acid The products were 2 2g of carbondioxide, 0 9g of
water and some sodium ethanoate What is the expected mass of sodium
ethanoate?

Deepika Sharma · Accepted Answer

Dear Student

Answering Question No 5

Na2CO3
+ 2CH3COOH →
2CH3COONa +
CO2 +
H2O
Suppose amount of sodium ethanoate is = x g
Amount in gram of reactant: 5 3 + 6
Amount in gram of Product: x + 2 2 +0 9
According to law of conservation of mass, total mass of
reactant side should be equal to total mass of product
Amount in gram of reactant = Amount in gram of
Product
5 3 + 6 = x + 2 2 +0 9
x = 8 2 g
Amount of sodium ethanoate is = 8 2 g

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