I need to predict the acid/base reactions of sodium carbonate with HCl, CH3COOH, NH3, and NaOH.
I'm stuck, when I'm writing out the ions to find the strongest acid and base, does the NaHCO3 become Na and HCO3, or N, H, and CO3?
Also, would these be polyproptic?
NaHCO3 ==> Na^+ + HCO3^-
Carbonates react with acids to form a salt, water, and carbon dioxide.
Now the reaction with NaOH results in no reaction.
Sodium Carbonate with NH3 in a salt brine solution can be manipulated to give sodium hydrogen carbonate as a product. The ammonia acts as a catalyst. But without a chloride, I am not certain of any reaction.
Also, what would the disappearance of an odour, pH change, and presence of bubbles signify when the soduim carbonate (baking soda) was added to the forementioned solutions?
all those indicate a possible chemical reaction.
If the solutions are concentrated enough, NaOH will react with NaHCO3 to form Na2CO3 and H2O. If you are doing this as an experiment, feel the walls of the test tube to see if it gets hot.
When writing out the ions for sodium carbonate (NaHCO3), it becomes Na+ and HCO3-. The Na+ ion comes from the sodium (Na) atom, and the HCO3- ion comes from the dissociation of the bicarbonate (HCO3-) group. So, you would consider Na+ and HCO3- as the separate ions in the reaction.
Regarding whether these reactions are polyprotic, it depends on the definition you are using. Polyprotic acids typically have multiple dissociable hydrogen ions (H+). In this case, sodium carbonate (NaHCO3) only has one dissociable hydrogen ion, so it is not considered polyprotic.
When sodium carbonate reacts with HCl (hydrochloric acid) or CH3COOH (acetic acid), it will produce a salt (NaCl or NaCH3COO), water (H2O), and carbon dioxide (CO2). This is because carbonates react with acids to form salts, water, and carbon dioxide.
If sodium carbonate reacts with NaOH (sodium hydroxide), there will be no reaction. Sodium carbonate is a weaker base compared to sodium hydroxide, so there is no displacement of ions.
The reaction of sodium carbonate with NH3 (ammonia) in a salt brine solution may result in the formation of sodium hydrogen carbonate (NaHCO3) as a product. Ammonia can act as a catalyst in this reaction. However, without the presence of chloride ions (Cl-), it is uncertain if any reaction will occur.
When sodium carbonate (baking soda) is added to the aforementioned solutions, the disappearance of an odor, a pH change, and the presence of bubbles indicate the possibility of a chemical reaction. The disappearance of an odor suggests that a reaction has neutralized or altered the odorous compound. The pH change can indicate the formation of new substances with different acidity or basicity. The presence of bubbles, specifically carbon dioxide gas (CO2) bubbles, indicates the release of a gas as a byproduct of the reaction.
If the solutions are concentrated enough, NaOH can react with NaHCO3 to form Na2CO3 (sodium carbonate) and H2O (water). If you are conducting this reaction as an experiment, you can also feel the walls of the test tube to see if it gets hot, indicating an exothermic reaction.