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Pavlova-9 [17]
4 years ago
10

Select the pH value you would expect for each of these solutions. an aqueous solution of HNO3 an aqueous solution of NaCl an aqu

eous solution of NaOH.
Chemistry
2 answers:
34kurt4 years ago
8 0

Answer:

PH=2.5

PH=7

PH=13

Explanation:

got the answer.

Neko [114]4 years ago
4 0

Answer:

An aqueous solution of HNO_3 will be an acid and have a pH of less than 7.

An aqueous solution of NaCl will be a neutral solution and have a pH equal to 7.

An aqueous solution of NaOH will be an base and have a pH of more than 7.

Explanation:

pH is defined as the negative logarithm of the concentration of hydrogen ions.

Thus,  

pH = - log [H⁺]

pH scale generally runs from 1 to 14 where pH = 7 represents neutral medium, pH < 7 represents acidic medium and pH > 7 represents basic medium.

Thus,

<u>An aqueous solution of HNO_3 will be an acid and have a pH of less than 7.</u>

<u>An aqueous solution of NaCl will be a neutral solution and have a pH equal to 7.</u>

<u>An aqueous solution of NaOH will be an base and have a pH of more than 7.</u>

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What is the molarity of the solution produced when 8.0g NaOH is dissolved in sufficient water to prepare 500.mL of solution?
Sindrei [870]

Answer:

Molarity = 0.4M

Explanation:

Molar mass of NaOH (M)= 40

m= 8g, V= 500ml=0.5L

n= m/M=[8/40]= 0.2mol

Applying

n= CV

0.2= C×0.5

C= 0.4M

8 0
3 years ago
If 0.2 g of nitrobenzene are added to 10.9 g of naphthalene, calculate the molality of the solution. (given: molar mass of nitro
In-s [12.5K]

Molality is defined as 1 mole of a solute in 1 kg of solvent.  

Molality=

\frac{Number of moles of solute}{Mass of solvent in kg}

Number of moles of solute, n=  

\frac{Given mass of the substance}{Molar mass of the substance}

Given mass of the nitrobenzene=0.2 g

Molar mass of the substance= 123.06 g mol⁻¹

Number of moles of nitrobenzene,  

n= \frac{0.2 }{123.06}

Number of moles of nitrobenzene, n= 0.0016  mol

Mass of 10.9 g of naphthalene in kg=0.0109  

Molality= \frac{0.0016}{0.0109 }

Molality= 0.146 m

7 0
3 years ago
Select the correct answer.
Svetlanka [38]

Answer:

alcohol

I hope this helps you

7 0
3 years ago
Truebor false is a substance is made of equal parts,the substance is knowns as complex substance
Alex
False i think im not sure
6 0
3 years ago
Calculate the ph of a solution in which [oh–] = 4.5 × 10–9m.
frosja888 [35]

pOH = -LOG([OH])  

pOH = -LOG(4.5*10^-9)  

pOH = 8.34  

pH + pOH = 14  

pH = 14 - 8.34 = 5.65

hope this helps!

(:

5 0
3 years ago
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