# How long does it take for zinc oxide powder and heinz vinegar to fully react into zinc acetate at a 1:2 ratio of zinc:heinz vinegar? [closed]

How long should I leave a solution of zinc oxide powder and heinz vinegar in order for it to react as completely as possible? The solution is 1(zinc oxide powder):2(heinz vinegar) in a glass flask. How much is this process increased by heat (say 50 deg C)? Without heat, should I cover the flask to prevent the acetic acid from evaporation while it reacts?

• Heinz vinegar is not a chemical substance to determine the ratio. If the vinegar contained 60 g acetic acid/L (about 6%), than you need minimally 2 L of vinegar for about 81 g of zinc oxide, but little excess would be needed. Sep 17, 2022 at 1:42
• So the short answer to the title question is: It would never fully react. Sep 17, 2022 at 2:49
• @Poutnik thank you so much for this response! How long would it take for the reaction to occur at room temp vs. gentle heat/stovetop? Sep 17, 2022 at 17:33
• And also just for future reference, what kind of calculation is done to determine how long these kind of reactions take? I now know you can use stoichiometry to figure out the ratios (lol), so what's the kind for duration as a function of temp? Sep 17, 2022 at 17:39
• Heterogenous reactions have too many unknown variables, so nothing beats empirical data. As a rule of thumb, reaction rates increase typically 2-4 times per 10 °C increase. Sep 17, 2022 at 19:14