Count the number of each type of ion in one formula unit of : 2 ions and 1 ion.
Calculate the total number of ions per formula unit: 2 (from ) + 1 (from ) = 3 ions.
Multiply the number of ions per formula unit by the number of moles of : 3 ions/formula unit 1.75 mol = total moles of ions.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Moles
A mole is a unit in chemistry that represents a specific quantity of particles, typically atoms or molecules. One mole contains approximately 6.022 x 10^23 entities, known as Avogadro's number. Understanding moles is essential for converting between the mass of a substance and the number of particles it contains, which is crucial for stoichiometric calculations.
Ionic compounds, such as K2SO4 (potassium sulfate), are formed from the electrostatic attraction between positively charged ions (cations) and negatively charged ions (anions). In K2SO4, potassium (K+) is the cation, and sulfate (SO4^2-) is the anion. Knowing the composition of ionic compounds helps in determining the total number of ions present in a given amount of the compound.
When ionic compounds dissolve in water, they dissociate into their constituent ions. For K2SO4, it dissociates into two potassium ions (K+) and one sulfate ion (SO4^2-). This dissociation is important for calculating the total number of ions produced from a given number of moles of the compound, which is necessary for answering the question about moles of ions.