Which of the following property is an extensive property?
Mass, volume and pressure are extensive properties.
Is density an extensive property?
The ratio of two extensive properties of the same object or system is an intensive property. For example, the ratio of an object’s mass and volume, which are two extensive properties, is density, which is an intensive property.
What is an extensive property that can be calculated?
Extensive properties, such as mass and volume, depend on the amount of matter being measured. Intensive properties, such as density and color, do not depend on the amount of the substance present. Physical properties can be measured without changing a substance’s chemical identity.
Which of the following is an extensive property of carbon?
Which of the following is an extensive property of the element carbon? If a property changes based on the amount of sample used, it’s extensive. Since mass of a carbon sample changes based on how much carbon you have, it’s extensive.
What is the difference between extensive and intensive farming?
Intensive Farming is a farming method that uses higher inputs and advanced agricultural techniques to increase the overall yield. In contrast, Extensive Farming is one in which more and more land is brought under cultivation to increase the output produced.
What are four examples of properties?
physical and chemical properties. Examples of physical properties are: color, smell, freezing point, boiling point, melting point, infra-red spectrum, attraction (paramagnetic) or repulsion (diamagnetic) to magnets, opacity, viscosity and density. There are many more examples.
How can you say one substance is different from other?
Different substances have different properties; density is one property that can be used to tell two substances apart. Density is a property that does not depend on the shape or size of an object.
What tests can be done to identify an unknown substance?
How Do We Approach an Unknown Substance
- Gas Chromatography (GC)
- Gas Chromatography Mass Spectroscopy (GC-MS)
- Ion Chromatography (IC)
- High Performance Liquid Chromatography (HPLC)
- Dispersive Raman Spectroscopy.
- Fourier Transfer Infrared Spectroscopy (FTIR)
How do you identify an unknown sample?
Identifying Unknown Substances
- Smell: Most chemists can identify solvents by their distinctive smells (though this is a pretty bad idea). ¹
- Melting point: If you’ve got very pure crystals, you can use their melting point to figure out which of several possible chemicals you’ve got.
Why is it important to identify unknown substances?
Identifying Unknown Substances. In order to solve a mystery, we often need to identify poisons, gunshot residue and other substances. Color, odor, and reaction to other substances are unique for individual substances and can help to identify important clues.
What is the first step to identify an unknown compound?
Formation of a solid derivative is a critical step in identifying an unknown. Many compounds have similar physical properties and give similar results in qualitative tests.
How do you identify an unknown metal?
Chemists use this same principle to determine the identity of unknown metals using a flame test. During a flame test, chemists take an unknown metal and put it under a flame. The flame will turn different colors based on which metal is in the substance. The scientists can then identify their unknown substance.
How can you identify an unknown liquid?
To identify a pure liquid substance using the physical properties of solubility, density, and boiling point. The physical properties of a pure substance can be measured without changing the composition of the substance.
How do you identify an unknown salt?
Students identify unknown chloride salts by (1) using a precipitation reaction to determine if the cation is a group 1 or group 2 metal, (2) performing a titration with silver nitrate to determine the formula mass of the salt, and (3) confirming the identity of the salt using a flame test.
How can you identify a salt?
There is a certain basic procedure to identify a salt that can be followed.
- Look at the Appearance of the Compound. Typically the compound appears in a solid form.
- Check the Effect of Heating.
- Conduct a Flame Test.
- Test Its Reaction with Hydrochloric Acid.
- Note Its Solubility in Water.
- Sieve analysis.
- Moisture analysis.
How do you identify cations?
Use flame tests to identify metal ions (cations). Lithium – Crimson, Sodium – Yellow, Potassium – Lilac, Calcium – Red, Copper(II) – blue-green. The following table shows the tests for aqueous cations: Aluminium, ammonium, calcium, chromium(III), copper, iron(II), iron(III), Zinc.
How do you test for salt?
The basic testing procedure for identifying a salt is as follows.
- Appearance of compound. The compound will most likely be in solid form.
- Heating effect.
- Flame test.
- Solubility in water.
- Reaction with nitric acid.
- Reaction with sodium hydroxide.
- Reaction with ammonia.
- Reaction with hydrochloric acid.
What is the salt test?
There’s no one way to take a salt pregnancy test (or an official set of rules, for that matter), but in general, all you have to do is combine a tablespoon or two of salt with a sample of your morning urine and wait a few minutes to a few hours. If your urine turns “milky” or “cheesy,” then you’re supposedly pregnant.
Why salt spray test is required?
Salt spray testing is a method of checking the corrosion resistance of coatings and materials used to manufacture products such as fasteners. During salt spray testing, an accelerated corrosive attack is produced in order to better predict how well the coating protects the metal.
What is the easiest way to identify salt in salt analysis?
*Note: Water extract of the salt can be prepared by dissolving a pinch of the inorganic salt in a few drops of water….Confirmatory Test for Anions.
| Anion | Confirmatory Test | Positive Observation |
|---|---|---|
| Iodide (I–) | Add silver nitrate to the water extract | Formation of a yellow precipitate which is insoluble in NH4OH |
How do you carry out salt analysis?
The procedure for testing salts in the laboratory consists of the following general steps.
- Make initial observations of the physical properties of the salt.
- Study the action of heat on the salt.
- Make aqueous solution of the salt to test for anions and cations present.
- Carry out confirmatory tests for cations and anions.
Is Salt analysis in Ncert?
Practical notes are not given in NCERT book. …
How do you prepare an original Solution for Salt analysis?
To prepare original solution small quantity of substance is shaken with cold, distilled water. It substance dissolves, whole substance is dissolved in water to prepare original solution. If substance remains insoluble then, mixture is heated and solubility is tested.
Why do we prepare original solution?
Why is it necessary to prepare original solution for the detection of basic radicals? Solution : the detection of basic radicals depends on the behaviour of ions in solution for this purpose the preparation of original solution is necessary as it furnishes free ions in solution.
How can you tell if salt is lead nitrate?
Lead nitrate is a white crystalline or powder salt that is soluble in water forming colorless aqueous solutions. Lead nitrate is a strong oxidizing reagent.
What are examples of salt colors?
Salts
| Name | Formula of the corresponding salts | Color |
|---|---|---|
| Manganese(II) chloride tetrahydrate | MnCl2·4H2O | Pink |
| Copper(II) chloride dihydrate | CuCl2·2H2O | Blue-green |
| Nickel(II) chloride hexahydrate | NiCl2·6H2O | Green |
| Lead(II) iodide | PbI2 | Yellow |