Android 2019 - Nh3 Aq, Chemical equation balancer, This program was created with a lot of help from: the book "parsing techniques - a practical guide" (imho, one of the best computer science books ever written.); the gold parsing system (hats off! what a great software product!) the calitha - gold engine (c#) (made it possible for me to do this program in c#). Chemical equation balancer, Instructions. to balance a chemical equation, enter an equation of a chemical reaction and press the balance button. the balanced equation will appear above.. Reversible reactions examples explained nh4cl <=> nh3, Part a 1. reversible reactions - introduction examples. a reversible reaction is a chemical change in which the products can be converted back to the original reactants under suitable conditions in a reversible reaction, changing the reaction conditions e.g. concentration, pressure or temperature will change the net direction the reaction goes i.e. more to the right (forward) or more to left ..