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Yeah. Just put the $ sign in front of your desired constant cell. Like $A6 if you wish to just change the number 6 serially and keep a constant, or $A$6 if you do not want anything from that reference to change at all. Example: Cell A5 contains my exchange rate.
Since the term Kc [H2O] is a constant, let it be symbolized by Kb, giving: Kb = ( [NH4+] [OHÂ¯] ) / [NH3] This constant, Kb, is called the base ionization constant. It can be determined by experiment and each base has its own unique value. For example, ammonia's value is 1.77 x 10Â¯5. From the chemical equation above, it can be seen that NH4+ and OHÂ¯ concentrations are in the molar ratio of one-to-one.