Not just unbalanced but insane. There is no compound with the formula HCI. HCl, yes but not HCI.
This equation is Ca + H2CO3 => CaCO3 + H2.
The balanced equation for potassium oxide (K2O) reacting with carbonic acid (H2CO3) is: K2O + H2CO3 -> 2KOH + CO2
The name is potassium carbonate, but there's NO (balanced) equation for just one compound. An equation is about a reaction e.g. synthesis or decomposition of K2CO3. This should be clearly stated in a question. Please rephrase it.
The coefficient of HCl in the balanced equation is 2. This is because the balanced equation shows that 1 molecule of CaCl2 reacts with 1 molecule of H2CO3 to form 1 molecule of CaCO3 and 2 molecules of HCl.
2 KOH + H2CO3 = 2 H2O + K2CO3
The balanced equation is: CaCl2 + H2CO3 -> CaCO3 + 2HCl. So, the coefficient needed is 2 in front of HCl to balance the reaction.
CaCl2 + H2CO3 = CaCO3 + 2HCl The molar ratios (coefficients) are 1:1::1:2
The reaction between carbonic acid (H2CO3) and calcium hydroxide (Ca(OH)2) forms calcium carbonate (CaCO3) and water (H2O). The balanced chemical equation for the reaction is: H2CO3 + Ca(OH)2 → CaCO3 + 2H2O.
There are to possible reactions depending on the relative amounts of each substance. If there is an abundance of sodium hydroxide the balanced equation will be: 2NaOH + H2CO3 --> 2H2O + Na2CO3 If there is more carbonic acid: NaOH + H2CO3 --> H2O + NaHCO3
3 H2CO3 + 2 Al(OH)3 --> Al2(CO3)3 + 6 H2O
That's not a chemical equation. But I believe the coefficient (the number in front of HCl) is 1. Normally, when you write equations, you don't put the 1. It's just inferred.
H2CO3 = Carbonic acid It is made by dissolving Carbon dioxide into Water. H2O + CO2 ----> H2CO3