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Some Basic Concepts Of Chemistry

Question
CBSEENCH11004932
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How many kilograms of caustic potash are required to completely neutralise 5 kg of hydrochloric acid?

Solution

KOH with 56 space straight g below space plus space HCl with 36.5 space straight g below space identical to space space KCl space plus straight H subscript 2 straight O
    36.5 space straight g space HCl space identical to space space 56 space straight g space KOH
    5000 space straight g space HCl space space identical to space fraction numerator 56 over denominator 36.5 end fraction cross times 5000 space space space space space space space space space space space space space space space space space space equals space 7.671 space Kg space KOH space space space space space space space space space space space space space space space space space equals space 7.671 space kg space KOH

Some More Questions From Some Basic Concepts of Chemistry Chapter

What is the number of significant figures in 9.984?

Express the Avogadro's number (6·023×1023) upto three significant figures.

What is the result of (5.472 - 1.12) to the appropriate number of signficant figures?

Express 0.0468 in scientific notation.

What does SI units stand for?

What is the relation between temperature in Kelvin (K) and temperature on centigrade scale?

The popular unit of pressure is atmosphere, how is it related to pascal?

What are SI units of the following:

(i) Density    
(ii) Molarity          
(iii) Energy    
(iv) Temperature ?

Out of 5.00 g and 5.0 g which one is more accurate and why?

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