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Mama L [17]
3 years ago
11

which laboratory process is used to determine the concentration of one solution by using a volume of another solution of known c

oncentration?
Chemistry
1 answer:
astra-53 [7]3 years ago
7 0

Answer: Titration : It is a laboratory process where we have to use the volume of a solution of known concentration to determine the concentration of unknown solution.

Explanation:

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Copper,oxygen,and____are examples of elements
Klio2033 [76]
 ··hydrogen peroxide   if its wrong sorry i didnt pay atention much but i do remember the elemants being hydrogen peroxide and oxygen and copper so ya                                                                                                         ω
7 0
3 years ago
Given the reaction to 2NaOH + H2 SO4 â Na2 SO4 + 2H2 O, what is the total number of grams of NaOH needed to react completely wit
vfiekz [6]

Answer:

4 moles, 160 g

Explanation:

The formula for the calculation of moles is shown below:

moles = \frac{Mass\ taken}{Molar\ mass}

For H_2SO_4:-  

Mass of H_2SO_4 = 196 g

Molar mass of H_2SO_4 = 98 g/mol

The formula for the calculation of moles is shown below:

moles = \frac{Mass\ taken}{Molar\ mass}

Thus,

Moles= \frac{196\ g}{98\ g/mol}

Moles\ of\ Sulfuric\ acid= 2\ mol

According to the given reaction:

2NaOH+H_2SO_4\rightarrow Na_2SO_4+2H_2O

1 mole of sulfuric acid reacts with 2 moles of NaOH

So,  

2 moles of sulfuric acid reacts with 2*2 moles of NaOH

Moles of NaOH must react = 4 moles

Molar mass of NaOH = 40 g/mol

<u>Mass = Moles*molar mass = 4\times 40\ g = 160 g</u>

7 0
2 years ago
How many moles of H2O form when 4.5 moles O2 reacts?
mart [117]

Explanation:

Start with a balanced equation.

2H2 + O2 → 2H2O

Assuming that H2 is in excess, multiply the given moles H2O by the mole ratio between O2 and H2O in the balanced equation so that moles H2O cancel.

5 mol H2O × (1 mol O2/2 mol H2O) = 2.5 mol O2

Answer: 2.5 mol O2 are needed to make 5 mol H2O, assuming H2 is in excess.

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3 years ago
Why does mecury hardly evaporate in room temperature
Crazy boy [7]
Because elemental mercury is a liquid at a room temperature
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3 years ago
What is an example of an electrolyte solution?
Karo-lina-s [1.5K]

Answer:

nacl with water

they are capable of conducting electricity

3 0
3 years ago
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