PLEASE PLEASE DON'T SPAM !!!!
JUST GIVE ME ANSWERS !!!!!!!!!!!!!!!!!
PLEASE !!!!!!!!!!!!!!!!!!!!!!!!!!!
Answers
Answer:
1)- When the compounds, reactants , products are written in symbolic form. The shortest way to express chemical reactions is to make use of the element symbols.
2) Decomposition reaction is the type of reaction in which the reactant give simpler products. In Decomposition reaction a compound breaks down to give two or more simpler substances. In this reaction there is only one reactant.
3) A synthesis reaction occurs when two or more reactants combine to form a single product. In a decomposition reaction, one reactant breaks down into two or more products. This is the reverse of a synthesis reaction. Replacement reactions occur when elements switch places in compounds.
4). Double decomposition reaction involves the exchange of partners. Explanation: It is a reaction between two compounds that exchanges the one part of a chemical compound with another part of a chemical compound to form two new chemical compounds.
5). The chemical equation needs to be balanced so that it follows the law of conservation of mass. A balanced chemical equation occurs when the number of the different atoms of elements in the reactants side is equal to that of the products side. Balancing chemical equations is a process of trial and error.
6). Aqueous (aq.)
(aq.) symbol is used to indicate a solution made in water.
7) On digestion of food the body faces a decomposition reaction, i.e. decomposition of food in our body. Decomposition is nothing but a chemical reaction and breaking down of food into digestible nutrients such as Carbohydrates, proteins, fats which our body required for proper functioning.
9) Silver bromide is a photosensitive compound that decomposes when exposes to sunlight. That is the reason it is always kept in the dark bottles. The reaction of silver chloride with sunlight is also called as photolytic decomposition reaction in which the decomposition reaction carried out by sunlight.
10) The chemical name of substance, which is used for white washing is calcium oxide. Its common name is lime or quick lime. The chemical formula of calcium oxide is CaO. When calcium oxide reacts with water it forms calcium hydroxide.
13). 2Na + 2H2O = 2NaOH + H2.
This is the balanced chemical equation which turns up when the sodium (Na) metal is made to react with water (H2O) to form Sodium Hydroxide Na(OH)2 and Hydrogen H2 Gas. This reaction is highly exothermic, the piece of the sodium melts while the reaction takes place.
14) Aluminum hydroxide is a base as it is hydroxide of metal which are basic in nature whereas sulphuric acid is an acid therefore reaction of acid and base will form salt and water . The reaction is called as neutralization reaction. Here sulphate salt of aluminum is formed with water.
The reaction is:
2Al(OH)3 + 3H2SO4 →Al2(SO4)3 + 6H2O
15). Ammonia reacts with hydrogen chloride to give white fumes of ammonium chloride. its an acid base reaction. NH3 is a lewis base and HCl is an acid.
16) When a rod of zinc metal is dipped into a solution of copper sulphate then the zinc reacts with it and displaces the copper. its colour will change from Blue to colourless in the meanwhile copper sulphate is blue and Zinc is colourless. Dear friend zinc is more reactive then copper . So it will displace copper.
( 8, 11 12, 17 these questions I'm not able to figure out the answers)
Hope the rest of the answers help u out.