Magnesium ions are removed in water treatment by the addition of slaked lime, Ca1OH22. Write a balanced chemical equation to describe what occurs in this process.

Q: Explain how vacancies are introduced in a solid NaCl crystal when a compound containing cation of…

A: How vacancies are introduced in a solid NaCl crystal when a compound containing cation of higher…

Q: If the radius of an atom is 211 pm what is the density of the solid if it crystallizes in the bcc…

A:

Q: What are the Silicate Ceramics? Give some examples? What are the uses of Silicate Ceramics?

A: Silicates are materials composed generally of silicon and oxygen. They were the first ceramics…

Q: Explain how homogeneous and heterogeneous alloys differ. Describe the differences between…

A: An alloy is a uniform mixture. It is made up of two or more chemical elements, of which at least one…

Q: Is amoxicillian sodium stable at 55 degrees celsius?

A: The carboxylic acid functional group is represented as -COOH and its reaction with the strong base…

Q: Draw and explain pressure-density phase diagram for CO2.

A: Phases diagram gives the graphical representation of the physical states of a substance under…

Q: Explain why water has a nonzero electrical conductivity even in the absence of impurities. Write…

A: Electrical conductivity: Electrical conductivity of any solution is defined as by saying that…

Q: How is plaster of Paris chemically different from gypsum? How may these be inter converted? Write…

A: Gypsum is a sulfate mineral which contains calcium sulfate dihydrate. The chemical formula is…

Q: How many Mn4 + and O2- ions are in the unit cell of the rutile MnO2?

A: The rutile structure for MnO2 can be given as follows:

Q: How can this effect be achieved through CO2 or dry ice? What does LPG stand for? How can a gas be…

A: The process of liquefying a gas, which transforms it from a gas to a liquid, is known as the…

Q: Explain, using intermolecular forces, why at room temperature, petrol (mainly octane, C8H18) is a…

A:

Q: What are some advantages and disadvantages of vitreous silica and soda-lime glass?

A: Vitreous silica is made from silica which is converted to glass. Soda lime in addition of silica…

Q: Describe the crystal structure of Pt, which crystallizes with four equivalent metal atoms in a cubic…

A: The platinum crystal consists of face-centered cubic arrangement. The unit cell consists of atoms of…

Q: Calculate Enthalpy of fusion and entropy of fusion

A: When a phase change of a substance takes place , heat changes also takes place, the heat change per…

Q: Write the chemical equation that describes the dissolution of gypsum in water and describe how many…

A: Gypsum dissociates in water to form its ions.

Q: What is the precipitate formed from the reaction of permanent hard water with sodium carbonate?…

A: Permanent hardness of water is due to very soluble magnesium sulfate and slightly soluble calcium…

Q: 1. T F The change in resistance to flow with temperature that many liquids exhibit is a chemical…

A: One of the important properties of liquids is the viscosity which is defined as the resistance of a…

Q: Coke is a porous fuel with a high carbon content used in the smelting of ores, production of metals,…

A: Introduction In water gas reaction, the reaction of carbon monoxide takes place with water vapor.…

Q: How does calcium chloride remove water vapor?

A: Calcium chloride compound is used to absorb the water vapours and remove the water molecules from…

Q: Explain the process of making an n -type and p -type semiconductor materials

A: p -type semiconductor : When a semiconductor ( Ge or Si ) is doped with electron deficient impurity…

Q: What will happen the sulfate ions supplied to the winogradsky column’s mud as (NH4)2SO4?

A: Given : The winogradsky column’s mud as (NH4)2SO4     To find:  What will happen the sulfate ions…

Q: How can you separate alumina (Al2O3) from silica present in bauxite ore? Write the chemical…

A: Filtering of aluminum from bauxite: Finely powdered bauxite metal is processed with a watery…

Q: Acid rain can be formed by the reaction of water with sulfur dioxide to form sulfurous acid. Write…

A: Acid rain is caused by a chemical reaction, in which compounds like sulfur dioxide and nitrogen…

Q: Explain the functionalization methods of carbon nanotubes.

A: The structure of a carbon nanotube is formed by a layer of carbon atoms that are bonded together in…

Q: Can sodium nitrite form H-bonds with water?

A: Sodium nitrite is NaNO2  It is an ionic compound

Q: Minerals that generally form from the evaporation of a water-based solution belong to which chemical…

A: Rocks which formed by evaporation of water-based solution are known as evaporites or evaporites…

Q: Colligative properties of a solution are mostly determined by—     degree of polarity of the…

A: Colligative properties are the properties of the solution . And the solution will be ideal in…

Q: what is the difference between a sulfer atom and a sulfer molecule?

A: The sulfur atom is an oxygen group element of atomic number 16. It consists of six valence electrons…

Q: Draw the structure of Na2S4O6 and what is O.N of sulphur in this compound?

A: The structure of Na2S4O6 can be drawn as follows:

Q: What are n-type semiconductors?

A: A n-type semiconductor is defined as a type of extrinsic semiconductor which is doped with a…

Q: 1. What is the effect of the nature of solvent on the electrical conductivity of solutions? 2. What…

A: 1) Nature of solvent affect the conductivity of solution:     Nature of the solvent:  many types of…

Q: From its phase diagram, why do you think CO2 is called dry ice

A: Triple point of a substance can be defined as the temperature and pressure at which three phases of…

Q: 9. Amorphous silica, SiO2, has a density of about 2.2 g/cm³, whereas the density of crystalline…

A: Answer - The amorphous material has less density then the crystalline material because the amorphous…

Q: Density question using Snow Water Equivalent

A: The water amount obtained on melting of large cubes or snow packs is called "Snow Water Equivalent".…

Q: What makes diamond one of the strongest materials known by scientists

A: Diamond is one of the hardest and strongest element present on earth . It is just because of…

Q: What are the various phases of SiO2?

A: The objective of the question is to write the various phases of SiO2.

Q: Use the themodynamic data to estimate the boiling point of bromine, Brz.

A: The values of  standard enthalpy change (∆H°) and standard entropy change (∆S°) for Br2(g) are 30.91…

Q: 2. Density of AgBr is 6.47 x 10 kg/m³. AgBr has fcc lattice and molecular weight of AgCl is 187.77…

A:

Q: Explain in detail the process by which water gets “Hard” (formation of hard water).

A: Hard water is water that has high mineral content (in contrast with "soft water"). Hard water is…

Q: Give the physical properties of: 1. Rubber band 2. Alum crystal

A: Physical properties: It refers to change or properties that define the particle externally and any…

Q: What is the difference between tetrahedral and octahedral voids?

A: The difference between tetrahedral and octahedral voids can be shown in below

States of Matter

The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates). 

Chemical Reactions and Equations

When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.