Phosphoric acid is a triprotic acid, ionizing in the following sequential steps: H3PO4 + H2O 
H2PO4- + H3O+ 
H2PO4- + H2O 
HPO42- + H3O+ 
HPO42- + H2O 
PO43- + H3O+ 
What is the Kb expression for the base, dihydrogen phosphate?
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Unit Product Cost
The total cost associated with producing a single unit of a product, including materials, labor, and overhead.
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Ongoing expenses that do not vary with production volume or business activity, shared across departments or products.
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