Sodium chloride is $NaCl$, and sodium sulfide is $Na_2S$. Why are there more sodium ions in the sulfide compound?

And of course, in an ionic solid (say $"sodium chloride"$), an isolated cation, a sodium ion, is BOUND ELECTROSTATICALLY to EVERY OTHER CHLORIDE ANION in the lattice. The attraction/repulsion follows...

Sodium sulfide is one of the few water soluble sulfides. To a sodium sulfide solution you can add elemental sulfur, which is normally very insoluble. The sulfide forms a polysulfide...

$"Stoichiometry"$ requires (i) that mass be balanced, and (ii) that charge be balanced........ We can put a check mark next to $(ii)$, but clearly for $(i)$ there are 2 natrium...

14.5g of $NaCl$ is equal to 0.248 mol according to the equation $n=m/M$ Now, this equates to $1.495 times 10^23$ Sodium chloride molecules. We get this if we multiply 0.248...

$%H_2O="Mass of water"/"Mass of hydrate"=(9xx18.01*g*mol^-1)/(240.18*g*mol^-1)xx100%=??%$

Magnesium, Potassium, Lithium, and Sodium all have an oxidation state of $+1$. Calcium has $+2$. Oxygen and Sulfur have an oxidation state of $-2$. Fluorine and Chlorine have an oxidation...

You know that $2"Na"_ ((s)) + "Cl"_ (2(g)) -> 2"NaCl"_ ((s))$ and that the reaction produced $"234 g"$ of sodium chloride. Convert this to moles by using the...

The first step for any chemical reaction is to write out the chemical equation to determine the molar ratios of the reactants and products. Then we will use the molecular...

While it's true that when a crystal of the ionic substance sodium chloride is dissolved in water the sodium and chloride ions separate from one another, they do not separate...

PbS (aq) $<=>$ $ Pb^(2+)$ (aq) + $ S^(2-)$ (aq) $K_(sp)$ = [ $ Pb^(2+)$ (aq) ] . [ $...