What is stoichiometric coefficient?

Answer 1

Stoichiometric amount is enough added so there's no excess of either product added together.

ie: CaOH+ H2CO3 in stoichiometric amounts means both are added so the final solution is neutral

Answer 2

Stoichiometric ratios depend upon the gases you're using. If you're referring to an air/gasoline ratio, it's 14.7:1. For hydrogen, it is 34 :1. Complete combustion of hydrogen would therefore require 34 times as much air as hydrogen fuel.

The stoichiometric ratio is the ideal quantity of reactants in a balanced chemical equation, so that there is both sufficient reactant and minimal residue.

Answer 3

An epoxy resin has an equivalent weight of 186 g/eqt. Diethylene triamine the curing agent used has an AHEW (Amine Hydrogen Equivalent Weight) of 21. The stoichiometric amounts would be 186 g of epoxy resin and 21g of amine.

If you were to use off-stoichiometry it would be for example, 200 g of epoxy resin to 21g of amine.

Answer 4

A stoichiometric coefficient is a whole number placed in front of a reagent's formula that indicates the molar ratio between it and another reagent in the same equation. For example, consider the chemical equation for the synthesis reaction of silver (Ag) and sulfur (S), which is:

2Ag + S --> Ag2S

You see a "2" in front of silver. This indicates that you need a 2-1 ratio of silver reactant to silver sulfide product in order for the equation to balance. The goal of balancing an equation is to uphold the law of conservation of matter, which states that matter cannot be created or destroyed. If no coefficient is present, it is understood to be a 1. Using moles, the formula reads "2 moles of silver combine with 1 mole of sulfur to produce 1 mole of silver sulfide."