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What is a change that has the same substances as reactants and products?
Wiki User
∙ 9y ago
It is a change in state. For instance, water may undergo boiling to form water vapour. The reactants and products are chemically the same, which is H2O. Another example would be the sublimation of ammonium chloride, where it changes directly from a solid to a gas.
The change from reactants to products is called as a chemical reaction. According to the key reaction involved there are several types of reactions. For example, an acid and a base undergo a neutralization reaction to produce a salt and water as products.
Wiki User
∙ 9y ago
Wiki User
∙ 9y agoIt is a change in state. For instance, water may undergo boiling to form water vapour. The reactants and products are chemically the same, which is H2O. Another example would be the sublimation of ammonium chloride, where it changes directly from a solid to a gas.
Wiki User
∙ 9y agoThe change from reactants to products is called as a chemical reaction. According to the key reaction involved there are several types of reactions. For example, an acid and a base undergo a neutralization reaction to produce a salt and water as products.
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What must be true about the properties of the reactants and the properties of the products in a chemical reaction?
The reactants and the products must contain the same numbers of the same types of atoms, that is, atoms with the same atomic number, and either the products must contain at least one type of chemical bond distinct from any chemical bond in the reactants or the reactants must contain at least one type of chemical bond not found in the products.
In chemistry the state in which a chemical process and the reverse chemical process occur at the same rate such that the concentrations of reactants and products do not change is called what?
EQUILIBRIUM
During a chemical reaction the total amount of mass present?
The sum of the masses of the reactants and the masses of the resulting substances, at a specified moment.
A chemical reaction has not occurred if the products have?
The same chemical properties as the reactants.
Why is high pressure necessary for making ammonia?
When producing ammonia, there is not a 100% change from reactants into products. In fact, around half of the reactants will change into ammonia, and then equilibria is reached and the amount of ammonia will stay the same. Increasing the pressure shifts the equilibria, so that more ammonia is produced when an equilibria is reached, making the process more efficient. Hypothetical example: 1 litre of reactants (normal pressure) -----> 0.5 litre reactants and 0.5 litre ammonia 1 litre of reactants (high pressure) -------> 0.2 litre reactants and 0.8 litre ammonia
When substances go through a chemical change what happens to the mass'?
The total mass of products is unchanged from the total mass of the reactants, but the masses of particular substances among the reactants or products change.
What is a change called in which the products are the same as the reactants?
This is a reversible reaction.
Which are the products and reactants of a chemical reaction most likely to have in common?
Input: reactants --> [ They react ] --> Output: products = what you get out of it
What holds true for a chemical change?
During a chemica change the composition of reactants is modified, new products appear.
What is the total of original and new substances that are the same after a chemical change?
It would be called a physical change, and would not be a chemical change at all. In order for a chemical change to occur, the original substances (reactants) must have different physical and chemical properties than the new substances (products).
The process of changing coefficients in a chemical reaction?
It's called balancing the equation. You did it so that both the reactants and the products have the same amount of the substances.
In a chemical reaction the total mass of the substances before the reaction is?
The mass of all substances before a chemical reaction is equal to the mass of the substance after the reaction. This is under the law of conservation of mass.
What are the products and reactants of a chemical change?
The reactants are the "befores" and the products are the "afters." For example, in this chemical reaction (acid-base neutralization): HCl + NaOH -> NaCl + H2O hydrochloric acid (HCl) and sodium hydroxide (NaOH) are the reactants, and sodium chloride (NaCl) and water (H2O) are the products.
What happens to the reactants in a chemical reaction?
Put casually, they react with each other to form products. e.g. Reactants A & B form products C & D A + B = C + D
What must be true about the properties of the reactants and the properties of the products in a chemical reaction?
The reactants and the products must contain the same numbers of the same types of atoms, that is, atoms with the same atomic number, and either the products must contain at least one type of chemical bond distinct from any chemical bond in the reactants or the reactants must contain at least one type of chemical bond not found in the products.
What are both sides of an equation equal to?
In Chemistry, this is the known as the Law of Conservation of Matter. While the moles of individual substances may change, the number of atoms of reactants is the same as the number of atoms of products.
What is true of a dynamic equilibrium?
When the concentration of the reactants is equal to the concentration of the products and does not change over time, the system has reached dynamic equilibrium. Dynamic equilibrium means that the reaction is still occurring and does not stop. The reaction never reaches completion, because the reverse reaction is moving at the same rate as the forward reaction. The products and reactants are balanced. The reactants are producing at the same speed that the products are changing back into the reactants. When a reaction is in dynamic equilibrium, it is hard to tell that a reaction is occurring. There is no net change in the concentration of the products or reactants because both forward and reverse reactions are moving at the same rate.
