science Flashcards
(26 cards)
What is a chemical reaction?
A process that involves the transformation of one or more substances into different substances.
True or False: In a chemical reaction, the mass of the reactants is equal to the mass of the products.
True
Fill in the blank: A ______ reaction occurs when two or more substances combine to form a single product.
synthesis
What type of reaction involves the breakdown of a compound into simpler substances?
decomposition reaction
Which type of reaction involves the exchange of ions between two compounds?
double displacement reaction
What is a combustion reaction?
A reaction where a substance combines with oxygen, releasing energy in the form of light or heat.
True or False: An endothermic reaction absorbs heat from its surroundings.
True
What do you call a reaction that releases energy, often in the form of heat?
exothermic reaction
Name the type of reaction: A + B → AB.
synthesis reaction
Name the type of reaction: AB → A + B.
decomposition reaction
In a single displacement reaction, what happens?
One element replaces another element in a compound.
What is the general form of a double displacement reaction?
AB + CD → AD + CB
What type of reaction occurs in batteries?
redox reaction
True or False: A catalyst is consumed in a chemical reaction.
False
What is the role of a catalyst in a chemical reaction?
To speed up the reaction without being consumed.
Fill in the blank: A ______ reaction is characterized by the transfer of electrons between reactants.
redox
What is the primary feature of an acid-base reaction?
The transfer of protons (H+) between reactants.
In a combustion reaction, what are the typical products formed?
Carbon dioxide and water.
What type of reaction is represented by: Zn + 2HCl → ZnCl2 + H2?
single displacement reaction
What is an example of a decomposition reaction?
The breakdown of water into hydrogen and oxygen.
What is the significance of the law of conservation of mass in chemical reactions?
It states that matter cannot be created or destroyed in a chemical reaction.
True or False: All chemical reactions are reversible.
False
What is the term for a reaction that occurs in multiple steps, often involving intermediates?
complex reaction
What type of reaction is exemplified by the reaction of an acid with a base?
neutralization reaction
