How sodium carbonate is used to remove rust from shirt

answer:

this is a fantastic way to remove rust and oxidation from steel and iron tools. it is not recommended for brass, aluminum, copper or exotic metals and alloys.

electrolysis is a method of removing iron oxide by passing a small electrical charge from a battery or battery charger through the rusty metal to stimulate an exchange of ions while the tool is submerged in an electrolyte solution.

describe matter a earth

"you start with 15.67 g mgco3-xh2o, when heated and all the water is removed, you are left with 7.58 g mgco3 only.

therefore, you had 15.67 - 7.58 = 8.09g h2o  

moles of each :

7.58g mgco3 = ? moles = 7.58g / 83.4g/mole = 0.09moles  

8 09g h2o = ? moles = 8.09g / 18g/mole = 0.44moles  

molar ratio between the two by dividing both numbers by the smallest number :

0.09 / 0.09 = 1  

0.44 / 0.09 = 4.8  

mgco3-5h2o"