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3 years ago

2. Why is the lonic compound Nacl (table salt) able to dissolve in a glass of the molecular compound water (H20)? (3 points)

Chemistry

1 answer:

melomori [17]3 years ago

6 0

Answer:

The correct answer is C ions from the solute molecules have a strong attraction to the polar solvent molecules.

Explanation:

NaCl or Sodium chloride is an ionic compound which easily get dissolved in polar molecular compound such as water(H2O).

Both NaCl and H2O are polar compound because the atoms that forms NaCl and H2O have vast difference in their electronegativities.As a result the bonding electrons in both NaCl and H2O are not equally shared.

NaCl get dissolved in water molecules by dipole dipole interaction.

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3 years ago

Maybe someone can help me out with this or give me the equation to find mols/liters - thanks to if you can help, here's the ques

zvonat [6]

Answer :The correct answers are :

Concentration in one can soup : Table salt = 6.12 $\frac{mol}{L}$

Table sugar = 5.84 $\frac{mol}{L}$

Concentration in one bowl Soup : Table salt = 3.82 $\frac{mol}{L}$

Table sugar = 3.65 $\frac{mol}{L}$

Concentration : It is quantity to measure a solution . It can be defined as abundance of constituents per volume of solution . The most used concentration is molar concentration .

Molar concentration is defined as mole of solute present in volume of solution . The unit of concentration is $\frac{mol}{L}$ . It is expressed as :

$Concentration ( \frac{mol}{L} ) = \frac{mole of solute (mol)}{Volume of solution (L)}$

Concentration in one can of soup (Volume = 250 mL )

Volume of one can soup = 250 mL . Converting it from mL to L as :

(1 L = 1000mL)

$Volume of one can soup = \frac{250 mL}{1000mL} * 1 L = 0.250 L$

A) Concentration of table salt :

Following are the steps to find out molar concentration :

Step 1 : Find mass of solute :

Since mass of solute is not given , so we take solubility of NaCL in 1 L of water . Solubility is maximum amount of NaCL that can be dissolved in 1 L water at room temperature . From image , we can say that 359 g of NaCL can be dissolved ideally in 1 L of water .

Since volume of solution is 0.250 L , so mass of salt in 0.250 L can be found :

Mass of NaCL in 1 L = 359 g

Mass of NaCL in 0.250 L of water = 359 g * 0.250 L

Mass of NaCL in 0.250 L = 89.75 g

Step 2 : Convert mass of solute to its mole

Mole can be calculate from mass as :

$Mole (mol) = \frac{given mass (g) }{molar mass \frac{g}{mol}}$

Molar mass of Table salt (given ) = 58.44 $\frac{g}{mol}$

plugging value of mass and molar mass in mole formula :

$Mole = \frac{89.75 g }{58.44 \frac{g}{mol}}$

Mole of Table salt = 1.53 mol

Step 3 : To find concentration .

Mole of solute = 1.53 mol

Volume of solution ( one can of soup ) = 0.250 L

Plugging these values in Concentration formula :

$Concentration = \frac{1.53 mol}{0.250 L}$

Concentration of Table salt in one can soup = 6.12 $\frac{mol}{L}$

B) Concentration of Table sugar :

Following steps can be used :

Step 1: To find mass of Table sugar

Since mass of sugar is not given , so solubility of sugar will be considered . From image solubility is 2000 g in 1 L of water .

Since volume of one cup soup is 0.250 L , so mass of Sugar in 0.250 L of solution =

Mass of sugar in 1 L of water = 2000 g

Mass of sugar in 0.250 L of solution = 2000 g* 0.250 L

Hence , mass of Sugar in 0.250 L of solution = 500 g

Step 2 : To convert mass of sugar to its mole

Mass can be converted to mole using same formula. Plugging value in mole formula :

$Mole of sugar = \frac{500 g}{342.3 \frac{g}{mol}}$

Mole of sugar = 1.46 mol

Step 3 : To find concentration of Sugar :

Mole of sugar = 1.46 mol

Volume of solution = 0.250 L

Plugging these values in concentration formula :

$Concentration = \frac{1.46 mol}{0.250 L} = 5.84 \frac{mol}{L}$

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Concentration in one bowl of soup :

Volume of one bowl of soup = 150 mL water + 250 mL of one can soup

= 400 mL

Converting mL to L : ( 1 L = 1000mL )

$Volume of solution = \frac{400 mL}{1000mL} * 1 L$

Volume of solution = 0.400 L

A) Concentration of Table salt :

Similar steps will be used :

Step 1: T find mass of Table salt

Again solubility will be used , which is =359 g in 1 L .Since 150 mL water is added which had no salt . hence all the salt was present in 250 mL one can soup , so mass of salt present in one can soup will be used .

Mass of Table salt = 89.75 g

Step 2: To convert mass to mole

Mass can be converted using mole formula .

Mole of Table salt = 1.53 mol ( calculated above )

Step 3: To find concentration

Mole of Table salt = 1.53 mol

Volume of one bowl soup = 0.400 L

Plugging these values in Concentration formula as:

$Concentration = \frac{1.53 mol}{0.400 L }$

Concentration of Table salt in one bowl soup = 3.82 $\frac{mol}{L}$

B) Concentration of Table sugar :

Step 1 : To find mass of Table sugar

Mass of sugar in 0.400 L will be same as that of mass of sugar present in 0.250 L since water had no sugar .

Mass of Table sugar = 500 g

Step 2 : To convert mass to mole

Mole can be calculated using mole formula ( as calculated above for one can soup )

Mole of Table sugar = 1.46 mol

Step 3: To find concentration

Mole of Table sugar (solute ) = 1.46 mol

Volume of one bowl soup = 0.400 L

Plugging these values in concentration formula :

$Concentration = \frac{1.46 mol}{0.400 L}$

Concentration of Table sugar in one bowl soup = 3.65 $\frac{mol}{L}$

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Also Note :You have marked Table sugar as Ionic which is incorrect .Table sugar is covalent as it has all non metals .

8 0

4 years ago

Which statement about the elements in the periodic table is true

egoroff_w [7]

A. The number of valence electrons increases as atomic mass increases. == Generally true for the representative elements since atomic mass generally increases with increasing Z.

B. The reactivity of alkali metals increases as atomic mass increases. == True. Atomic mass increases down the column and so does reactivity

C. The reactivity of the halogens increases as atomic mass increases. == False. Reactivity decreases down the column.

D. The number of valence electrons decreases across a period. == False. In general, the number of valence electrons increases across a period, particularly for the representative elements.

6 0

3 years ago

Read 2 more answers

For the following reaction, find the value of Q and predict the direction of change, given that a 1L flask initially contains 2

Tresset [83]

Answer:

C) Q < K, reaction will make more products

Explanation: