NaOH (aq) + HNO3 (aq) → NaNO3 (aq) + H2O (l)
This is an acid-base reaction (neutralization): NaOH is a base, HNO3 is an acid.
Reactants:
- NaOH
- HNO3 – Nitric acid



- Other names: Aqua fortis


, Spirit of niter 
, Eau forte 
- Appearance: Colorless, yellow or red fuming liquid
; Colourless-to-yellow liquid with pungent odour
; Colorless, yellow, or red, fuming liquid with an acrid, suffocating odor. [Note: Often used in an aqueous solution. Fuming nitric acid is concentrated nitric acid that contains dissolved nitrogen dioxide.] 
- Other names: Aqua fortis
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