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- "Na"_2"S" When dealing with ionic compounds, it's important to know that the cation is always written first and the anion is written second. In this case, sodium,"Na", will be your cations and sulfide will be your anion.
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What is the chemical formula for potassium sulfate ion?
What is the formula unit for sodium chloride?
What is the empirical formula for sodium chloride and calcium chloride?
How do you name a cation and an anion?
The rules are simple, name the cation first and the anion second, giving the anion the -ide suffix. Cation (metal) first Anion (nonmetal) second with -ide suffix
Note: If dealing with a strong acid, treat the "H" as a cation (break the acid HA into H + and A-, where A is any anion, noting the number of hydrogens equals the charge of the anion, as the acid must be neutral). We will cover acids in the next section. Determine Product Formula based on principle of charge neutrality
The formula unit or empirical formula represents the minimum proportion between cations and anions in the crystal lattice. In sodium chloride, there is one Na + cation per each Cl-, so the formula unit for sodium chloride is is NaCl. In calcium chloride, there are two Cl-anions per Ca 2 + cation, so the empirical formula for calcium chloride is ...
- Introduction
- Definitions of molecular, complete ionic, and net ionic equations
- Summary
- Try it!
As a diligent student of chemistry, you will likely encounter tons of reactions that occur in aqueous solution (perhaps you are already drowning in them!). When ions are involved in a reaction, the equation for the reaction can be written with various levels of detail. Depending on which part of the reaction you are interested in, you might write a...
A molecular equation is sometimes simply called a balanced equation. In a molecular equation, any ionic compounds or acids are represented as neutral compounds using their chemical formulas. The state of each substance is indicated in parentheses after the formula.
[Huh?]
Let's consider the reaction that occurs between AgNO3 and NaCl . When aqueous solutions of AgNO3 and NaCl are mixed, solid AgCl and aqueous NaNO3 are formed. Using this information, we can write a balanced molecular equation for the reaction:
AgNO3(aq)+NaCl(aq)→AgCl(s)+NaNO3(aq)
[What kind of reaction is this?]
If we could zoom in on the contents of the reaction beaker, though, we wouldn't find actual molecules of AgNO3 , NaCl , or NaNO3 . Since AgNO3 , NaCl , and NaNO3 are soluble ionic compounds, they dissociate into their constituent ions in water. For example, NaCl dissociates into one ion of Na+ for every ion of Cl− ; these ions are stabilized by ion-dipole interactions with the surrounding water molecules.
A net ionic equation shows only the chemical species that are involved in a reaction, while a complete ionic equation also includes the spectator ions. We can find the net ionic equation for a given reaction using the following steps:
1.Write the balanced molecular equation for the reaction, including the state of each substance.
2.Using your knowledge of solubility rules, strong acids, and strong bases, rewrite the molecular equation as a complete ionic equation that shows which compounds are dissociated into ions.
[I haven't learned about strong acids and bases yet!]
3.Identify and cancel out the spectator ions (the ions that appear on both sides of the equation).
[Want to double check your work?]
Sulfuric acid, H2SO4(aq) , is a strong acid that completely dissociates into H+ and SO42− ions in aqueous solution. Sodium hydroxide, NaOH(aq) , is a strong base that completely dissociates into Na+ and OH− ions in aqueous solution. When H2SO4(aq) and NaOH(aq) are combined, the products are water and aqueous sodium sulfate, Na2SO4(aq) . This reaction is represented by the molecular equation below.
HA2SOA4(aq)+2NaOH(aq)→2HA2O(l)+NaA2SOA4(aq)
Which of the following is the balanced net ionic equation for the reaction between H2SO4(aq) and NaOH(aq) ?
Choose 1 answer:
Choose 1 answer:
•(Choice A)
And there are four possible combinations of cation and anion. The first combination is neither the cation nor the anion will react with water. And if that's the case, the resulting solution will be neutral. We've already talked about an aqueous solution of sodium chloride being a neutral solution.
- 14 min
But not all anions end in "ide". If there is oxygen involved as well, then they end in "ite" or "ate". For example, sodium sulfate (Na2SO4, made of Na+ and SO4^2- ions).
- 4 min
Nov 1, 2023 · The equation can be read as one neutral formula unit of lead (II) nitrate combined with a superstoichiometric amount of water (solvent) yields one lead (II) cation and two nitrate anions, both ions in aqueous phase. In case of hydrates, we could show the waters of hydration as product species.
