CHEMISTRY MIDDLE SCHOOL

Aqueous solution of copper sulphate is acidic . Why?

Answers

Answer 1
Answer:

Answer:

Explanation:

Aqueous solution of copper sulphate

​is acidic in nature, as when copper sulphate on dissolving with water, following chemical reaction takes place :

CuSO4 + 2 H2O ====> Cu(OH)2 + H2 SO4

​As we can see, copper hydroxide and sulphuric acid is generated in this chemical reaction.Copper hydroxide is a weak base whereas sulphuric acid is a very strong acid which results into increase in acidity of the solution.

Thus, the aqueous solution of copper sulphate is acidic in nature.

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An atom that has a charge because it has gained or lost electrons isA. an ion
B. an isotope
C. a new element

Answers

An ions have charge and it gains or loses electrons.

Heliocentric theory:was initially rejected
was supported by Galileo
stated that the earth rotated around the sun
all of the above

Answers

All of th above support the heliocentric theory.

Answer:

It is all of the above.

Explanation:

The Heliocentric theory was indeed rejected by many people. Most people were religious and the church believed in the Geocentric theory.

Galileo did indeed support the the theory by using his telescope and observed the moons of Jupiter and saw how they all orbited Jupiter which contributed to the Heliocentric theory.

The Heliocentric theory did believe that the Earth rotated around our sun.

How would changing the proportions of substance in an alloy change its properties?

Answers

An alloy is a mixture of two or more metals which is produced with a specific proportion between metals. So, if the proportion is changed the physical characteristic would be changed as well. For example, brass musical instruments are made of brass which is a mixture (an alloy) of zinc and copper in a specific proportion. If you change a proportion, you will change the physical characteristic of brass musical instruments, and a sound they produce will be different. 

Final answer:

Adjusting the proportions of substances in an alloy can significantly alter its physical and chemical properties, including hardness, boiling point, physical strength, and resistance to corrosion. These changes can cause phenomena such as rusting or shifting in acidity.

Explanation:

Changing the proportions of substances in an alloy impacts its properties. For instance, changing the ratios of iron, carbon, nickel, and other elements in steel, an alloy, can affect its physical strength and resistance to corrosion. It's crucial to understand that in any alloy, the relative compositions of different elements produce the character of the alloy. For example, in steel, altering the amount of carbon can change the hardness and tensile strength of the final product.

It's also important to know about the law of multiple proportions in chemistry. This law states that when two elements react to form more than one compound, a fixed mass of one element will react with masses of the other element in a ratio of small whole numbers. In alloy formation, these proportions of mass can significantly affect the properties of the resulting alloy.

Physical and chemical properties, such as hardness and boiling point, can be altered by changing the proportions in an alloy. These shifts can lead to both physical or chemical changes, such as melting, freezing, rusting, or even changes in flammability and acidity.

Learn more about Alloys and their Properties here:

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The ______ parts of organisms are most likely to become fossils.

Answers

The hard parts of an organism, such as shells and bones.
hard parts of organisms are mist likely to become fossils

HELP ASAP 20 PTS!!!Fireworkium (Fw): This element has 15 protons and 15 electrons in its neutral atom.



Toothium (T): This is a nonmetal with an average atomic mass number close to 19.



Floatium (Fl): This is a gas that the aliens often use to fill balloons and blimps. It contains two protons in its nucleus.



Breathium (Bt): This element is a nonmetal and has one less proton than an atom of Toothium and has an atomic mass close to 16 amu.



Lightium (Lg): This is a gas that does not react with other elements. It glows when it is heated in a lamp or vacuum tube. It contains one more proton in its nucleus than Toothium.



Rottoneggium (Re): This is a nonmetal with one less electron than Mustarium. It has a total of 16 electrons in its electron cloud.


I honestly don't understand

Answers

Basically they are asking you to find the element that is most closely associated with these clues.

1. Fireworkium: 15 protons and 15 electrons? No problem. We can see that the atomic number is 15, in which in real life, the element is Phosphorous. (Phosphorous is a common element in fireworks for an explosive personality and colors)

2. Toothium: A nonmetal with average mass number close to 19? We check the periodic table once more and find that Fluorine is our answer. (Notice that fluorine is in toothpaste, which is why they decided the name Toothier)

3. Breathium: Now honestly, I didn't even have to check the periodic table but just realize that we breath Oxygen. But if you want the straight answer, Oxygen is a nonmetal which has an atomic mass close to 16, and surprise, it has one less proton than Fluorine.

4.Lightium: Immediately we see that since this gas does not react with other elements, it is a noble gas. If it glows in a lamp or vacuum tube, we can also see it is of a light origin. If it has one more proton than Toothium (Fluorine) than we can immediately see that in the periodic table, our answer is Neon.

5. Rottoneggium: We can immediately guess sulfur. The straight way shows that it has 16 electrons, and the non-ion atom should also have 16 protons. Therefore, our answer is Sulfur.

6. I just realized I forgot Floatium: If it has 2 protons, we look in the periodic table and see that our answer is Helium.

What are some facts about ionic bonding?
I need some information for my poster

Answers

 - they are always formed by a cation and a anion 

- they transfer electrons rather than shared 

- all are binary ionic compounds are solids 

- they are neutral i.e. no charge
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