Question

sulfuro de calcio (ca y s) *
tu respuesta

Explanation:

To determine the chemical formula for calcium sulfide (sulfuro de calcio) with calcium (Ca) and sulfur (S), we follow these steps:

Step 1: Determine the oxidation states

Calcium (Ca) is an alkaline earth metal and typically has an oxidation state of +2 ($\text{Ca}^{2+}$). Sulfur (S) in sulfide compounds typically has an oxidation state of -2 ($\text{S}^{2-}$).

Step 2: Balance the charges

To form a neutral compound, the total positive charge must equal the total negative charge. Let the formula be $\text{Ca}_x\text{S}_y$. The charge balance gives:
$x \times (+2) + y \times (-2) = 0$

Simplifying, $2x - 2y = 0 \implies x = y$. Thus, the simplest ratio of Ca to S is 1:1.

Step 3: Write the formula

Using the ratio from Step 2, the chemical formula for calcium sulfide is $\text{CaS}$.

Answer:

$\boldsymbol{\text{CaS}}$