Magnesium (Mg) reacts very slowly with hot water.It reacts with steam when being heated and gives hydrogen gas and metal oxide. Calcium (Ca) reacts slowly with cold water. Magnesium reacts with steam faster than cold water because magnesium needs to burn to get magnesium oxide and to get magnesium oxide there has to be heat and since steam … Red hot iron (Fe) reacts with steam at high temperature. And lastly, gold (Au) is a noble metal, it barely reacts with the steam also. It is much easier to split the O2 molecule into bare O than it is to yank two H atoms from a water molecule, which is why we expect MgO to be more prevalent in steam versus if you just dropped the magnesium in water. There are two methods given - in one the hydrogen burns at the mouth of the flask, in the second it is collected. This is a very tricky question, and you've obviously thought about it quite a bit :). Beryllium. This protects the metal and stops it reacting. The resource provides a list of apparatus and chemicals needed for the experiment, together with teaching tips. This is done by heating the water until it turns to steam. It stops further reaction hence reaction stops at this stage On the other hand WITH STEAM its reaction is different. When metals react with steam, the resultants are a metal oxide and hydrogen. Metals below magnesium in the reactivity series will not react with water unless additional energy is supplied in the form of heat. The Facts. Metals low in the metal reactivity series do not react with water even at high temperature. Mg react with cold water to form hydroxide which stick to metal in form of very thin layer. Reactions with steam Magnesium reacts slowly when it is first added to water, but a layer of insoluble magnesium hydroxide forms. Really, both answers are good ones. reacts violently even ld water.with the co Magnesium (Mg) on the orhand reacthe ts to a very little extent to the warm water. In this classic demonstration, from the Royal Society of Chemistry, burning magnesium is plunged into steam above boiling water. It does however react with steam, forming magnesium oxide, MgO, or magnesium hydroxide, Mg(OH) 2 , with excess steam… This page looks at the reactions of the Group 2 elements - beryllium, magnesium, calcium, strontium and barium - with water (or steam). Magnesium does not react with liquid water at room temperature. It uses these reactions to explore the trend in reactivity in Group 2.