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3 years ago

How can we regain the hardness of water by adding lime?

Chemistry

2 answers:

777dan777 [17]3 years ago

8 0

Answer:

Softening - In water softening, hydrated lime is used to remove carbonate "hardness" from the water. Hardness caused by other calcium and magnesium salts, called noncarbonate hardness, is generally treated by means of the lime-soda process, which entails the precipitation of magnesium by lime.

Maru [420]3 years ago

5 0

Answer:

due to the bicarbonate of CaCO3

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The carbon-carbon (C―C) bond has an average bond energy of 347 kJ/mol, which is the energy required to break one mole of C―C bon

olganol [36]

Answer:

(3) 345 nm

Explanation:

Given:

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To determine:

Wavelength of photon that can break a C-C bond

Calculation:

The energy (E) of a photon is related to its wavelength (λ) by the Planck's equation:

$E = \frac{hc}{\lambda }$

where h = Planck's constant = 6.626*10⁻³⁴ Js

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Since 1 nanometer (nm) = 10⁻⁹ m

The calculated wavelength corresponds to 345 nm

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3 years ago

How can we regain the hardness of water by adding lime?​

How can we regain the hardness of water by adding lime?