reacciones quimicas

    Master this deck with 35 terms through effective study methods.

    No description available

    Created by @pol

    What are chemical transformations?

    New substances form while others disappear.

    What defines a physical transformation?

    Substances remain the same before and after.

    What is a chemical reaction?

    Reactants change into products.

    What is a chemical equation?

    It represents a chemical reaction.

    What are stoichiometric coefficients?

    Numbers that balance atoms in a reaction.

    What does the law of conservation of mass state?

    Mass of reactants equals mass of products.

    What happens during a chemical reaction?

    Bonds break and new bonds form.

    What are endothermic reactions?

    They absorb energy as heat.

    What distinguishes exothermic reactions?

    They release energy as heat.

    How does temperature affect reaction speed?

    Higher temperature increases molecular speed.

    What is a combustion reaction?

    A substance reacts with O2 to produce CO2 and H2O.

    What is a decomposition reaction?

    A single compound breaks down into simpler substances.

    What is a synthesis reaction?

    Two or more substances combine to form one product.

    What causes acid rain?

    Pollutants react with water to form acids.

    What is the greenhouse effect?

    Gases trap heat, raising Earth's temperature.

    What leads to the ozone layer depletion?

    CFCs reduce ozone thickness in the atmosphere.

    What happens when H2SO4 reacts with NaOH?

    Produces Na2SO4 and water.

    What is the result of heating CaCO3?

    It decomposes into CaO and CO2.

    What products are formed from the combustion of C3H8?

    Generates CO2 and water.

    What does H2CO3 decompose into?

    Forms CO2 and water.

    What is produced when CaO reacts with water?

    Forms calcium hydroxide, Ca(OH)2.

    What is the product of carbon reacting with oxygen?

    Produces carbon monoxide, CO.

    What is formed when iron reacts with oxygen?

    Creates iron(III) oxide, Fe2O3.

    What do HCl and Ca(OH)2 produce?

    Results in CaCl2 and water.

    How do you calculate the missing mass in a reaction?

    Apply the law of conservation of mass.

    What is the balanced reaction for magnesium oxidation?

    Mg + O2 → MgO.

    Which has a greater mass: a new iron nail or an oxidized one?

    The oxidized nail has greater mass due to added oxygen.

    What mass of oxygen is needed for 222 g of iron to form Fe2O3?

    Calculate based on the balanced reaction.

    What reaction occurs when CaO reacts with water?

    CaO + H2O → Ca(OH)2.

    What type of process occurs when NaOH dissolves in water?

    It is an exothermic process.

    What happens when ice melts in your hands?

    It absorbs heat, indicating an endothermic process.

    Why do we store food in the fridge?

    To slow down bacterial growth.

    What is better for speeding up a reaction: heating or cooling?

    Heating is better as it increases kinetic energy.

    What effect does concentration have on reaction rates?

    Higher concentration increases the rate of reaction.

    Why must some medications be stored in cool places?

    To maintain stability and prevent degradation.