Complete and balance each of the following equations for gas-evolutions. Express answer as a chemical equation. Identify all the phases in your answer.
HCl(aq)+K2SO3(aq)-->
HCl(aq)+KHCO3(aq)-->
HC2H3O2(aq)+NaHSO3(aq)-->
(NH4)2SO4(aq)+KOH(aq)-->
2HCl + K2SO3 ==> H2SO3 + 2KCl
I shall be happy to explain what you don't understand about the others.
To complete and balance the given gas-evolution equations, we need to identify the products formed and balance the number of atoms on each side of the equation.
Let's solve each equation step-by-step:
1. HCl(aq) + K2SO3(aq) →
In this equation, we have hydrochloric acid (HCl) reacting with potassium sulfite (K2SO3). The reaction will produce a gas, which we need to identify. To do this, we can refer to the solubility rules and determine if any of the resulting ions will form a gas.
The solubility rules state that all common salts of Group 1A metals (such as K+) and ammonium ions (NH4+) are soluble and do not form gases. Sulfite ions (SO3^2-) usually form a gas when reacted with an acid, so the gas-evolution equation can be represented as:
HCl(aq) + K2SO3(aq) → SO2(g) + 2KCl(aq)
2. HCl(aq) + KHCO3(aq) →
In this equation, we have hydrochloric acid (HCl) reacting with potassium bicarbonate (KHCO3). Similar to the previous equation, we need to identify the gas that will be evolved.
Bicarbonate ions (HCO3-) also tend to release gas when reacted with acids. Therefore, the equation can be balanced as:
HCl(aq) + KHCO3(aq) → CO2(g) + KCl(aq) + H2O(l)
3. HC2H3O2(aq) + NaHSO3(aq) →
In this equation, we have acetic acid (HC2H3O2) reacting with sodium bisulfite (NaHSO3). Here, we need to identify the gas being evolved.
Bisulfite ions (HSO3-) will react with acids and release gas. Therefore, the balanced equation is:
HC2H3O2(aq) + NaHSO3(aq) → SO2(g) + NaC2H3O2(aq) + H2O(l)
4. (NH4)2SO4(aq) + KOH(aq) →
In this equation, we have ammonium sulfate ((NH4)2SO4) reacting with potassium hydroxide (KOH). We need to identify the gas formed.
In this case, there is no gas formed as both products (ammonium hydroxide and potassium sulfate) are soluble in water. Therefore, the balanced equation will not include any gas:
(NH4)2SO4(aq) + 2KOH(aq) → 2NH4OH(aq) + K2SO4(aq)
In the above equation, the phases are represented as follows:
(aq) represents an aqueous solution
(g) represents a gas
(s) represents a solid
(l) represents a liquid
Make sure to double-check these balanced equations to ensure accuracy.