what chemicals are being added together in the chemical equation of 2HCL + Ca -> CaCl2 + H2
The reactants are the (two) chemicals to the left of the reaction arrow
Physical science
In the chemical equation 2HCl + Ca -> CaCl2 + H2, the reactants are 2 moles of hydrochloric acid (HCl) and 1 mole of calcium (Ca). The products formed after the reaction are 1 mole of calcium chloride (CaCl2) and 1 mole of hydrogen gas (H2).
To determine which chemicals are being added together in a chemical equation, it is important to understand the stoichiometry, which represents the balanced coefficients of the reactants and products in the equation.
To balance this equation, you would need to ensure that the number of each element on both sides of the equation is equal. In this case, there is already a balanced equation.
So, in the reaction, 2 moles of hydrochloric acid (HCl) and 1 mole of calcium (Ca) are being added together to form 1 mole of calcium chloride (CaCl2) and 1 mole of hydrogen gas (H2).