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Sep 25, 2022 · Write the formula for lithium oxide. 1. Write the symbol and charge of the cation (metal) first and the anion (nonmetal) second. Al3 + N3 −. Li + O2 −. 2. Use a multiplier to make the total charge of the cations and anions equal to each other. total charge of cations = total charge of anions.
Table: Common Polyatomic ion the topic of acids and polyatomic ions, there is nomenclature of aqueous acids. Such acids include sulfuric acid (H 2 SO 4) or carbonic acid (H 2 CO 3). To name them, follow these quick, simple rules: If the ion ends in -ate and is added with an acid, the acid name will have an -ic ending.
Write the chemical formula for an ionic compound composed of each pair of ions. the potassium ion and the sulfate ion; the calcium ion and the nitrate ion; SOLUTION. Potassium ions have a charge of 1+, while sulfate ions have a charge of 2−. We will need two potassium ions to balance the charge on the sulfate ion, so the proper chemical ...
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- 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)
It needs one electron to make it stable at 8 electrons in its valence shells. This makes chlorine a #Cl^(−1)# anion. Ionic bonds form when the charges between the metal cation and non-metal anion are equal and opposite. This means that two #Cl^(−1)# anions will balance with one #Ca^(+2)# cation. This makes the formula for calcium chloride ...
Many ionic compounds contain polyatomic ions (Table 6.2a) as the cation, the anion, or both. As with simple ionic compounds, these compounds must also be electrically neutral, so their formulas can be predicted by treating the polyatomic ions as discrete units. We use parentheses in a formula to indicate a group of atoms that behave as a unit.
Jan 2, 2021 · If you need to add a subscript to a polyatomic ion, enclose it in parentheses so it is clear the subscript applies to the entire ion and not to an individual atom. An example is aluminum sulfate, Al 2 (SO 4) 3. The parenthesis around the sulfate anion indicates three of the 2- sulfate ions are needed to balance 2 of the 3+ charged aluminum cations.
