Why is water considered a universal solvent

Answers

Answer 1

Answer: Water is capable of dissolving a variety of different substances, which is why it is such a good solvent. And, water is called the "universal solvent" because it dissolves more substances than any other liquid. This is important to every living thing on earth.

Answer 2

Answer:

Final answer:

Water is considered a universal solvent due to its polar nature, which enables it to dissolve ionic compounds and polar molecules. This is because water's charged particles form hydrogen bonds with surrounding water molecules, creating hydration shells that keep the solute particles dispersed. This unique property allows water to dissolve a variety of substances.

Explanation:

Water is considered a universalsolvent because of its polar nature. Being polar, water has slight positive and negative charges, making it capable of dissolving ionic compounds and polar molecules. These charged particles form hydrogen bonds with water molecules, forming hydration shells that keep the solute particles separated or dispersed in the water. This ability of water to dissolve a wide range of substances makes it a universal solvent.

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If 62.8 g Ca react with 92.3 g HCl according to the reaction below, how many grams of hydrogen gas will be produced, and how many grams of the excess reactant will be left over?Unbalanced equation: Ca + HCl → CaCl2 + H2

Answers

Answer:

2.53 grams of hydrogen gas will be produced and 12.2 many grams of the excess reactant i.e. calcium will be left over.

Explanation:

$Ca + 2HCl\rightarrow CaCl_2 + H_2$

Moles of calcium = $(62.8 g)/(40 g/mol)=1.57 mol$

Moles of HCl = $(92.3 g)/(36.5 g/mol)=2.53 mol$

According to reaction, 2 moles of HCl reacts with 1 mole of calcium :

Then 2.53 moles of HCl will recat with :

$(1)/(2)* 2.53 mol= 1.265 mol$ of calcium.

As we can see moles of calcium are in excessive amount. Hence calcium is an excessive reagent.

Moles of calcium left unreacted =1.57 mol - 1.265 mol =0.305 mol

Mass calcium left unreacted = 0.305 mol × 40 g/mol =12.2 g

Since, calcium is an excessive reagent HCl is limiting reagent and the amount of hydrogen gas produced will depend on HCl .

According to reaction, 2 moles of HCl gives 1 mole of hydrogen gas.

Then 2.53 moles of HCl will give:

$(1)/(2)* 2.53 mol= 1.265 mol$ of hydrogen gas.

Mass of 1.265 mol of hydrogen gas = 1.265 mol × 2 g/mol = 2.53 g

2.53 grams of hydrogen gas will be produced and 12.2 many grams of the excess reactant i.e. calcium will be left over.

Answer:

2.55 g of hydrogen

12.17 g calcium.

to nearest hundredth.

Explanation:

The balanced equation is:

Ca + 2HCl ---> CaCl2 + H2

Using the atomic masses

40.078 g Ca react with 72.916 g of HCl to give 2.016 g HCl

The ratio of Ca to HCl in the above is 1 to 1.81935

so 62.8 g Ca reacts with 62.8 * 1.81935 = 114.245 g HCl

so there is excess of Ca in the given weights.

Therefore the mass of Hydrogen produced

= (2.016 / 72.916) * 92.3

= 2.552 g of hydrogen gas.

The mass of calcium required to produce 2.552 g of hydrogen is:

(2.552 / 2.016) * 40.078

= 50.73 g

So the excess of calcium is 62.8 - 50.73

= 12.17 g.

A compound contain only carbon, Hydrogen, Oxygen. Mass percentage of carbon is 52.2%, relative molecular mass of compound is 46, Find how many hydrogen atom present

Answers

Answer:

Six

Explanation:

Mᵣ = 46

Aᵣ(C) = 0.522 × 46 = 24

Difference = 22

Less 1 O = -16

Aᵣ(H) = 6

The relative atomic mass of the H atoms is 6.

The molecule contains six hydrogen atoms.

Which has should only be produced in a fume hood?a. Cl2
b. CO2
c. H2
d. H2O

Answers

The gas that should only be produced in a fume hood is a. Cl2.
Chlorine gas is toxic gas. Upon inhalation, it irritates the pulmonary tract and damages the respiratory tract. Both short term and long term exposure to Cl2 gas are known to have destructive effects.

Chlorine melts at 172 k what is chlorines melting point in C

Answers

<HTML><META HTTP-EQUIV="content-type" CONTENT="text/html;charset=utf-8"> K = 273.15 + C K = 172 so substitute 172 = 273.15 + C C = 172 - 273.15 = -101.15 </DIV>

Consider the following reaction: 2HCl + Ca(OH)2 CaCl2 + 2H2O A scientist wants to neutralize 25 mL of 0.001 M Ca(OH)2 with a volume of 0.005 M HCl. What is the minimum volume of HCl required?

Answers

The balanced chemical equation for the above reaction is as follows ;
Ca(OH)2 + 2HCl —> CaCl2 + 2H2O
Stoichiometry of Ca(OH)2 to HCl is 1:2
Number of Ca(OH)2 moles present - 0.001 mol/L / 1000 mL/L x 25 mL
Number of Ca(OH)2 moles = 2.5 x 10^(-5) mol
Number of HCl moles needed for neutralisation = 2.5 x 10^(-5) mol x2 = 5 x 10 ^(-5) mol
The molarity of HCl solution is 0.005 M
The solution contains 0.005 mol in 1000 mL
Therefore volume of 5x10^(-5) mol in = 1000/0.005 x 5 x 10^(-5) mol = 10 mL
10 mL of HCl is needed for neutralisation

Fill the 25-ml graduated cylinder with 11.5 mL
of water, what’s the volume?

Answers

Answer:

The volume of the water is 11.5 ml

Explanation:

Volume refers to the space occupied by a fluid.

Usually, a graduated cylinder is used to measure the volume of a fliud. Hence, the volume of the fluid as measured by the graduated cylinder in this case is 11.5 no.

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