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Is formation of a precipitate an indication of a chemical change?
One example is the reaction between the aqueous solutions lead nitrate, Pb(NO3)2 and potassium chloride, KCl. They react to form solid (a precipitate) lead chloride, PbCl2, and aqueous potassium nitrate, KNO3. The balanced equation is Pb(NO3)2(aq) + KCl(aq) ---> PbCl2(s) + KNO3(aq)
What are the limitations of the chemical equation?
Chemical equations do not provide information about the speed of a reaction, the conditions under which a reaction occurs, or the purity of the reactants. They also do not account for side reactions or variations in reaction pathways. Additionally, chemical equations do not indicate the physical state of reactants and products or the equilibrium state of a reaction.
What is the purpose of heating under reflux in a chemical reaction?
Heating under reflux in a chemical reaction is done to ensure that the reaction proceeds smoothly and efficiently by maintaining a constant temperature and preventing the loss of volatile reactants or products. This method allows for better control of the reaction conditions and helps to increase the yield of the desired product.
What does the subscript r stand for in chemistry qr?
The subscript r in chemistry typically refers to a rate constant in a chemical reaction. It represents the rate at which a reaction occurs under specific conditions.
What information does a chemical equation not provide?
A chemical equation does not provide information about the speed of the reaction, the physical state of the reactants and products, or the mechanism by which the reaction occurs. Additionally, it does not give information about the conditions under which the reaction is taking place, such as temperature, pressure, or catalysts.
What is present after a chemical reaction?
That depends on the chemicals present before the chemical reaction and sometimes the conditions under which the chemical reaction occurred.
A substance that enables a chemical reaction to proceed under different conditions?
catalyst.
Is formation of a precipitate an indication of a chemical change?
One example is the reaction between the aqueous solutions lead nitrate, Pb(NO3)2 and potassium chloride, KCl. They react to form solid (a precipitate) lead chloride, PbCl2, and aqueous potassium nitrate, KNO3. The balanced equation is Pb(NO3)2(aq) + KCl(aq) ---> PbCl2(s) + KNO3(aq)
A substance that enables a chemical reaction to proceed under the different conditions than otherwise possible?
Catalyst
What is a substance that enables a chemical reaction to proceed under different conditions?
A catalyst is a substance that enables a chemical reaction to proceed under different conditions. It lowers the activation energy required for the reaction to occur, allowing it to happen more quickly or at a lower temperature or pressure. The catalyst itself remains unchanged in the reaction and can be reused multiple times.
How can you realise a chemical reaction?
By making interact under certain conditions of temperature, pressure, concentration, etc. the reactants.
What are the limitations of the chemical equation?
Chemical equations do not provide information about the speed of a reaction, the conditions under which a reaction occurs, or the purity of the reactants. They also do not account for side reactions or variations in reaction pathways. Additionally, chemical equations do not indicate the physical state of reactants and products or the equilibrium state of a reaction.
What is the purpose of heating under reflux in a chemical reaction?
Heating under reflux in a chemical reaction is done to ensure that the reaction proceeds smoothly and efficiently by maintaining a constant temperature and preventing the loss of volatile reactants or products. This method allows for better control of the reaction conditions and helps to increase the yield of the desired product.
What does the subscript r stand for in chemistry qr?
The subscript r in chemistry typically refers to a rate constant in a chemical reaction. It represents the rate at which a reaction occurs under specific conditions.
What information does a chemical equation not provide?
A chemical equation does not provide information about the speed of the reaction, the physical state of the reactants and products, or the mechanism by which the reaction occurs. Additionally, it does not give information about the conditions under which the reaction is taking place, such as temperature, pressure, or catalysts.
Are Pyritre Rocks Chemical or Mechanical?
The mineral pyrite is composed of iron and sulfur. FeS2. And is created by a chemical reaction between the two under certain geologic conditions.
Why look for black precipitate in the butt instead of on the surface of an H2S test?
The black precipitate usually sink to the bottom which the reaction took place in. The reaction takes place at the bottom because it only occurs under anaerobic conditions, and it does not sink to the bottom as it only occurs at the bottom, not around oxygen at the top of the tube.
