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What are key words for chemical changes?
Key words for chemical changes include reactants, products, chemical equation, chemical reaction, bonds breaking/forming, and energy changes.
How is thermochemical equation different from a balanced chemical equation?
A thermochemical equation includes information about the energy changes associated with a chemical reaction, such as enthalpy changes. A balanced chemical equation shows the reactants and products involved in a chemical reaction in their correct proportions. While a balanced chemical equation gives the stoichiometry of the reaction, a thermochemical equation provides additional information about the heat flow during the reaction.
Adding potassium iodide to lead nitrate is it physical or chemical change?
This is a chemical change because a new compound, potassium nitrate, is formed through a chemical reaction between the potassium iodide and lead nitrate. Physical changes do not involve the formation of new substances.
Why are the potassium and nitrate ions not involved in the equilibrium reaction?
Potassium and nitrate ions are spectator ions in the equilibrium reaction, meaning they do not participate in the chemical changes and are present on both sides of the equation without being consumed or produced. They do not affect the equilibrium or the equilibrium constant of the reaction.
How is the van't Hoff equation derived and what are its implications in chemical thermodynamics?
The van't Hoff equation is derived from the relationship between temperature and equilibrium constant in chemical reactions. It helps predict how changes in temperature affect the equilibrium position of a reaction. This equation is important in chemical thermodynamics as it allows for the calculation of thermodynamic properties such as enthalpy and entropy changes.
What are key words for chemical changes?
Key words for chemical changes include reactants, products, chemical equation, chemical reaction, bonds breaking/forming, and energy changes.
How is thermochemical equation different from a balanced chemical equation?
A thermochemical equation includes information about the energy changes associated with a chemical reaction, such as enthalpy changes. A balanced chemical equation shows the reactants and products involved in a chemical reaction in their correct proportions. While a balanced chemical equation gives the stoichiometry of the reaction, a thermochemical equation provides additional information about the heat flow during the reaction.
What chemical's solubility is most affected by change in temperature potassium nitrate or salt?
Potassium nitrate's solubility is more affected by changes in temperature compared to salt. Generally, the solubility of solids in water increases with temperature. Potassium nitrate has a significant increase in solubility with temperature, while salt's solubility is relatively unaffected by temperature changes.
Adding potassium iodide to lead nitrate is it physical or chemical change?
This is a chemical change because a new compound, potassium nitrate, is formed through a chemical reaction between the potassium iodide and lead nitrate. Physical changes do not involve the formation of new substances.
Why are the potassium and nitrate ions not involved in the equilibrium reaction?
Potassium and nitrate ions are spectator ions in the equilibrium reaction, meaning they do not participate in the chemical changes and are present on both sides of the equation without being consumed or produced. They do not affect the equilibrium or the equilibrium constant of the reaction.
How is the van't Hoff equation derived and what are its implications in chemical thermodynamics?
The van't Hoff equation is derived from the relationship between temperature and equilibrium constant in chemical reactions. It helps predict how changes in temperature affect the equilibrium position of a reaction. This equation is important in chemical thermodynamics as it allows for the calculation of thermodynamic properties such as enthalpy and entropy changes.
What does potassium permanganate (KMnO4) do in chemical reactions?
Potassium permanganate (KMnO4) is a strong oxidizing agent that can react with various substances by transferring oxygen atoms. It is commonly used in chemical reactions to oxidize other compounds, causing them to undergo chemical changes.
What are the molicules the left side of chemical equation called?
The molecules on the left side of a chemical equation are called reactants. Reactants are the substances that are present at the beginning of a chemical reaction and undergo changes to form the products.
What can NEVER change these to make the equation balanced?
Changing subscripts in chemical formulas should never be done to balance a chemical equation because it changes the identity of the compounds involved. Instead, coefficients should be adjusted to balance the equation without altering the chemical formulas.
Why is it incorrect to balance a chemical equation by changing the subscripts?
Changing subscripts in a chemical formula changes the identity of the compound being represented. Balancing a chemical equation involves changing the coefficients in front of the chemical formulas to ensure that the same number of each type of atom is present on both sides of the equation.
Why is it wrong to change subcripts when balancing chemical equation?
When you are balancing known reactants and known products which is always the case when you are asked to "balance" a chemical equation you must not change the subscripts as that changes the reactants or the products to a different chemical compound.
What shows changes that take place during a chemical reaction?
Evidence of a chemical reaction includes color change, formation of precipitate, evolution of gas, and changes in temperature. These changes can indicate that new substances are being formed through the rearrangement of atoms.
