Balance each of the following chemical equations: a. K(s)+H2 O(l) ⟶KOH(a q)+H2(g) b. Cr(s)+S8(s)

step 1 So on this problem, it says to balance each of the following chemical reactions. For the first o

Balance each of the following chemical equations: a. K(s)+H2...

Balance each of the following chemical equations: a. $\mathrm{K}(s)+\mathrm{H}_{2} \mathrm{O}(l) \longrightarrow \mathrm{KOH}(a q)+\mathrm{H}_{2}(g)$ b. $\mathrm{Cr}(s)+\mathrm{S}_{8}(s) \longrightarrow \mathrm{Cr}_{2} \mathrm{~S}_{3}(s)$ c. $\mathrm{BCl}_{3}(s)+\mathrm{H}_{2} \mathrm{O}(l) \longrightarrow \mathrm{H}_{3} \mathrm{BO}_{3}(a q)+\mathrm{HCl}(a q)$ d. $\mathrm{Fe}(\mathrm{OH})_{3}(s)+\mathrm{H}_{2} \mathrm{SO}_{4}(a q) \longrightarrow \mathrm{Fe}_{2}\left(\mathrm{SO}_{4}\right)_{3}(a q)+\mathrm{H}_{2} \mathrm{O}(l)$ e. $\mathrm{BaCl}_{2}(a q)+\mathrm{Na}_{3} \mathrm{PO}_{4}(a q) \longrightarrow$ $$\mathrm{Ba}_{3}\left(\mathrm{PO}_{4}\right)_{2}(s)+\mathrm{NaCl}(a q)$$

Balance each of the following chemical equations:
a. $\mathrm{K}(s)+\mathrm{H}_{2} \mathrm{O}(l) \longrightarrow \mathrm{KOH}(a q)+\mathrm{H}_{2}(g)$
b. $\mathrm{Cr}(s)+\mathrm{S}_{8}(s) \longrightarrow \mathrm{Cr}_{2} \mathrm{~S}_{3}(s)$
c. $\mathrm{BCl}_{3}(s)+\mathrm{H}_{2} \mathrm{O}(l) \longrightarrow \mathrm{H}_{3} \mathrm{BO}_{3}(a q)+\mathrm{HCl}(a q)$
d. $\mathrm{Fe}(\mathrm{OH})_{3}(s)+\mathrm{H}_{2} \mathrm{SO}_{4}(a q) \longrightarrow \mathrm{Fe}_{2}\left(\mathrm{SO}_{4}\right)_{3}(a q)+\mathrm{H}_{2} \mathrm{O}(l)$
e. $\mathrm{BaCl}_{2}(a q)+\mathrm{Na}_{3} \mathrm{PO}_{4}(a q) \longrightarrow$
$$\mathrm{Ba}_{3}\left(\mathrm{PO}_{4}\right)_{2}(s)+\mathrm{NaCl}(a q)$$

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Key Concepts

Law of Conservation of Mass

This fundamental principle states that matter cannot be created or destroyed in a chemical reaction. In the context of balancing equations, it means that the number of atoms for each element must be the same on both the reactant and product sides of the equation.

Stoichiometry

Stoichiometry involves the quantitative relationships between reactants and products in a chemical reaction. It provides the basis for determining the correct proportions of substances needed in order to balance the chemical equation in accordance with the conservation of mass.

Balancing Chemical Equations

This process refers to the method of adjusting coefficients in a chemical equation so that the number of atoms for each element is equal on both sides. Achieving a balanced equation is crucial for accurately representing the reaction and for any quantitative chemical analysis.

Chemical Formulas and State Symbols

Understanding chemical formulas and state symbols is essential for representing the substances involved in a reaction. These notations indicate the composition and physical state (solid, liquid, gas, or aqueous) of each substance, which is important for correctly setting up and balancing the equation.

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