Question

One .
There are 15 multiple choice question, only
the options in every question de
soweit. Choose
the correct option.
Q1. The given equation vepresents the reaction
of Hodiim metal with water,
šodium t water - Hodium hydrouide, + Hydusgen
Which of the following chemical equalibna
represente in compute balanced chemical
equation for zien word
equation?
4. 2ha(s)+H20->2NaOH(aq) + H2 (9)
B. Nais)+ 2H17 0.-NGOH(aq) + 2 Helgi
C. 2.N« (S) +2 H30 -->2nafoH(aq) + 2H, (g)
B. 2 Mee ($)+2H20 --2. Na DH(aq) + H/g)
?​

Answer 1

Answer:One .

There are 15 multiple choice question, only

the options in every question de

soweit. Choose

the correct option.

Q1. The given equation represents the reaction

of Sodium metal with water,

šodium t water - Sodium hydroxide, + Hydrogen

Which of the following chemical equilibria

represente in compute balanced chemical

equation for zien word

equation?

4. 2ha(s)+H20->2NaOH(aq) + H2 (9)

B. Nais)+ 2H17 0.-NGOH(aq) + 2 Helgi

C. 2.N« (S) +2 H30 -->2naoH(aq) + 2H, (g)

B. 2 Mee ($)+2H20 --2. Na DH(aq) + H/g)

?​

Explanation:

Sodium (Na) and water

Sodium and water: reaction mechanisms, environmental impact and health effects

For billions of years sodium is washed out from rocks and soils, ending up in oceans, where it may remain for about 50.106 years. Seawater contains approximately 11,000 ppm sodium. Rivers contain only about 9 ppm.

Drinking water usually contains about 50 mg/L sodium. This value is clearly higher for mineral water. In soluble form sodium always occurs as Na+ ions.

In what way and in what form does sodium react with water?

Elementary sodium reacts strongly with water, according to the following reaction mechanism:

2Na(s) + 2H2O → 2NaOH(aq) + H2(g)

A colourless solution is formed, consisting of strongly alkalic sodium hydroxide (caustic soda) and hydrogen gas. This is an exothermic reaction. Sodium metal is heated and may ignite and burn with a characteristic orange flame. Hydrogen gas released during the burning process reacts strongly with oxygen in the air.

A number of sodium compounds do not react as strongly with water, but are strongly water soluble.

Solubility of sodium and sodium compounds

A number of examples of water solubility of sodium are available. De most familiar sodium compounds is sodium chloride (NaCl), otherwise known as kitchen salt. At 20oC solubility is 359 g/L, in other words adequately water soluble. Solubility is nearly temperature independent. Sodium carbonate (Na2CO3) is also adequately water soluble. Solubility is 220 g/L at 20oC.