In your first experiment, the rust ($\ce{Fe2O3. The time taken for the iron rust to be remove completely by the vinegar from the iron nail is recorded by using stopwatch. Take the rusty object and give it a well-soak to the vinegar and salt solution. xH2O}$) probably reacted with vinegar to form Iron (III) acetate which makes the solution reddish in color.. Back it off a quarter turn. Although rust is considered the result of an oxidation reaction, it's worth noting not all iron oxides are rust. Rust signifiers due to the reaction of O dissolved in dihydrogen monoxide ( H2O ) with Fe. vinegar is acetic acid and lemon contain citric acid so that's what dissolving the rust/corrosion (oxides ), both are known as "weak acids" baking soda is sodium bicarbonate (a base in chemistry terms) putting the two together creates a chemical reaction that produces carbon dioxide, water and some other products Every so often, check on the rust removal progress. Yes, vinegar is an acid and it is much more corrosive to iron than plain water is. The bottom of the drum had this kind of mottled look that appears to be associated with galvanization. Rust forms when oxygen reacts with iron, but simply putting iron and oxygen together isn't sufficient. Drop your rusty metal into the jar and then pour in the vinegar. The rusted iron nail is immersed into the cup contained vinegar. The vinegar reacts with the rust to dissolve it off of the metal. The Chemical Reaction That Forms Rust . The object needs to be well-submerged. It is less abrasive than steel wool, but will still do the trick in removing the rust. Rust is capable of forming on lots of different objects. Fill to about 2" from the top to allow for the expansion of the acid-rust chemical reaction. Vinegar reacts differently to different metals. If met with the right conditions, rust build-up can be hard to remove and can potentially damage surfaces it comes into contact with. The reaction is observed. Put a cap or lid on the jar to prevent vinegar evaporation, but do not tighten the lid all the way. So I bought a steel drum a couple days ago and wanted to make an Ugly Drum Smoker out of it, but wanted to make sure it wasn't galvanized first. Then, you can see any remaining rust spots and give them a little wipe with some steel wool. You will see bubbles as the vinegar reacts with the rust. Acetic acid contained in white vinegar will break down rust by stripping the electrons from ferrous oxide (rust) causing it to detach from the metal. Many household items can be used to remove rust, such as vinegar and baking soda. Let them sit. [ 1 ] ( Kellen, 2005, Vinegar Institute Site ) Rust is define as the ruddy or orange coating that forms on the surface of Fe when exposed to air and wet milieus, dwelling mass of ferrous hydrated oxide. Acid is not used very much to corrode iron; rather, it is used to remove rust from iron. Vinegar is inserted into a transparent cup. In your second experiment, the iron on the clean nail surface would have reacted with vinegar to form Iron (II) acetate.There are two main reasons why the solution might appear to have no change: The process to remove rust stain is carried out. These ferrous oxide is formed through oxidization. Once you think all the rust is removed that will be, remove the tools and rinse them in water. Now you have to give a rest to the item for the next 12 hours to a few days based on the level of the rust. The problem you are having is the assumption that the amount of rust is the same thing as the amount of corrosion; but rust is misleading! To use, soak the metal in white vinegar for a few hours and then scrub the rusty paste off. You need to allow for the expanding gasses to release. Why is vinegar causing my steel to rust? Although about 21% of air consists of oxygen, rusting doesn't occur in dry air. 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