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What are the differences between sandstone and limestone in terms of their composition and geological formation?
Sandstone is primarily composed of sand-sized grains of minerals and rock fragments, while limestone is mainly made up of calcium carbonate from marine organisms like shells and coral. Sandstone forms from the accumulation and cementation of sand grains, while limestone forms from the compression and cementation of calcium carbonate-rich sediments.
How can you tell the difference between diamonds and calcite?
Diamonds and calcite can be differentiated based on their hardness and crystal structure. Diamonds are one of the hardest substances on Earth and will scratch glass, while calcite is relatively soft and can be easily scratched. In terms of crystal structure, diamonds form in a cubic structure, while calcite has a rhombohedral crystal structure. Additionally, diamonds have a higher refractive index and will sparkle more compared to calcite.
What are the differences between gypsum and limestone in terms of their composition and uses?
Gypsum and limestone are both sedimentary rocks, but they have different compositions and uses. Gypsum is made of calcium sulfate dihydrate, while limestone is primarily composed of calcium carbonate. Gypsum is commonly used in construction for drywall and plaster, while limestone is used in construction for buildings and roads.
How hard is technetium on a scale from 1 to 10?
Technetium is relatively rare, with an atomic number of 43. In terms of hardness, it does not have a defined ranking on the Mohs scale, which is typically used to measure the hardness of minerals from 1 (softest) to 10 (hardest).
What mineral is most resistant to scratching?
Diamond is the hardest mineral and is the most resistant to scratching. Its hardness is assigned a value of 10 on the Mohs scale of mineral hardness, making it the top-ranked mineral in terms of scratch resistance.
How do you calculate the hardness of water?
The hardness of water is calculated by measuring the concentration of calcium and magnesium ions in the water. This is typically done using a titration method with a chelating agent like EDTA. The results are then expressed in terms of calcium carbonate equivalents.
Why hardness is always calculated in terms of caco3?
Hard water is a mixture of calcium, magnesium, and bicarbonate, sulphate, chloride, etc. Hardness of water is expressed in units of mg CaCO3 / L as if all calcium and magnesium were formed as CaCO3. This unit is how many mg of CaCO3 would precipitate per liter of hard water.
In terms of particles how and why the rate of reaction changes during the reaction of calcium carbonate with hydrochloric acid.?
The chemical reaction goes faster if calcium carbonate is powdered.
What are the differences between magnesium carbonate and calcium carbonate in terms of their properties and uses?
Magnesium carbonate and calcium carbonate are both white powders, but they have different properties and uses. Magnesium carbonate is less dense and more soluble in water than calcium carbonate. It is commonly used in antacids and as a drying agent in some products. Calcium carbonate is more commonly used as a dietary supplement and in the production of cement, paper, and plastics.
What is the correct chemical name for limestone or marble?
Marble is known as Calcium Carbonate (CaCO3) in terms of chemical formula.
What does sulfuric acid calcium carbonate equal simple terms?
The reaction is:CaCO3 + H2SO4 = CaSO4 + H2O + CO2
Why is water harder in certain regions of the world than in others?
Water from regions around the World with abundance of Limestone (which is made up of ionic molecules of calcium oxide) and other calcium-containing rocks tend to have calcium ions dissolve into the water, which in terms would make water harder in certain regions.
What is the unit of hardness?
The unit of hardness is typically expressed in terms of Rockwell (HRC), Vickers (HV), or Brinell (HB) scale depending on the specific test method used. Hardness is a measure of a material's resistance to deformation or indentation.
What is hardness limit of water?
The hardness limit of water is typically referred to as the maximum amount of dissolved minerals, such as calcium and magnesium, that can be present in water before it is considered hard. This limit is often expressed in terms of grains per gallon (gpg) or parts per million (ppm), with water classified as hard if it exceeds around 7 gpg or 120 ppm of hardness minerals.
What is the social effects of calcium carbonate?
Calcium carbonate does not have direct social effects in terms of interactions or behaviors between individuals. However, its presence in materials like food, medicines, and construction products can impact society by providing essential nutrients, supporting health, and contributing to infrastructure development.
What is the difference between sandstone and limestone in terms of where they came from?
Sandstone is made chiefly of quartz or feldspar grains, and limestone of calcium carbonate grains. Sand grains are usually formed by the erosion of older rocks. Calcium carbonate grains may be formed by the evaporation of sea water, or by the deposition of the exoskeletons of sea creatures.
What is a hardness required for tablet according to usp?
According to the USP (United States Pharmacopeia), the hardness requirement for tablets is typically specified as a minimum force required to crush the tablet. This is often expressed in terms of kiloponds or newtons. The specific hardness requirement may vary depending on the formulation and purpose of the tablet.
