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Alex17521 [72]
3 years ago
13

Iron is used to make steel for building bridges. Some bridges have blocks of magnesium attached to them. Explain why?

Chemistry
1 answer:
Ede4ka [16]3 years ago
6 0
Blocks of magnesium is used to prevent iron corrosion.
This way of prevention is called sacrificial protection.
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If 30 ml of water containing 15 mg of salicylate is extracted with 30 ml of chloroform, 2.59 mg of salicylate remains in the wat
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Answer:

Distribution coefficient: 4.79

Explanation:

Distribution coefficient is the ratio between equilibrium concentration of non-aqueous phase and aqueous phase where both solvents are inmiscible. The equation for the problem is:

Distribution coefficient: Concentration in chloroform / Concentration in Water

<em>Concentration in water: 2.59mg / 30mL = 0.08633mg/mL</em>

<em>Concentration in chloroform: (15mg-2.59mg) / 30mL = 0.4137mg/mL</em>

<em />

Distribution coefficient: 0.4137mg/mL / 0.08633mg/mL

<h3>Distribution coefficient: 4.79</h3>
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2 years ago
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3 years ago
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A laboratory procedure calls for making 590.0 mL of a 1.1 M KNO3 solution. How much KNO3 in grams is needed?
AveGali [126]
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C = n/V
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_____________________________

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