The reagent is NaHCO3.
A reagent in chemical science is a “substance or compound that is added to a system in order to bring a chemical reaction or is added to check whether a reaction is occurred or not.”
Such a reaction is used to confirm the detection of the presence of another substance.
A reactant is a substrate in a reaction, whereas a reagent is a catalyst. Regents can also be limiting.
Limiting reagents stop a chemical reaction when they are used up.
The chemical reaction relies on the reagent to continue the reaction and stops when there is no more substance.
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