Chemical Reactions Vocab

a substance with a pH greater than 7; will increase the concentration of hydroxide ions in solution

• acid

• base

• neutral

a change from one state of matter (solid, liquid, gas) to another without a change in chemical composition

• chemical change

• physical change

• phase change

• chemical reaction

the number placed in front of a chemical formula to indicates the number of molecules present

• subscript

• superscript

• coefficient

interaction between molecules that causes a chemical change, converting an existing substance into a new substance

• chemical change

• physical change

• phase change

• chemical reaction

a symbol, usually a letter or a number, placed immediately below and to the right of a written character

• subscript

• superscript

• coefficient

a reaction in which one atom or ion in a compound is replaced by another atom or ion

• single-replacement reactions

• double-replacement reactions

• acid-base reaction

• synthesis reaction

a substance that has a pH below 7; will increase the concentration of hydrogen ions in solution

• acid

• base

• neutral

an ionic substance (H3O+) formed when a water molecule combines with a hydrogen ion

• hydroxide ion

• hydronium ion

• cation

• anion

the substances present before a chemical reaction occurs; in a chemical reaction the arrow usually points away from the reactant(s)

• reactant

• product

• compound

• molecule

a chemical reaction between two compounds where the cations in two compounds switch the anions they are bonded to, resulting in two new compounds

• single-replacement reaction

• double-replacement reaction

• acid-base reaction

• synthesis