chemistry a level help
does magnesium react with liquid water to form magneisum hydroxide?
mg + 2h20(l) -->mg(OH)2 + H2
because my teacher taught me that it only does this:
mg + H20(g) --> MgO+H2
and that only MgO + H2O forms Mg(OH)2
however, im wondering if mg forms mg(oh)2 when it reacts with liquid water too? or only if magnesium oxide and water forms mg(oh)2
this is the same for sodium:
na +H20(l) --> naoh + h2
but na2O + h2o --> also forms NaOH but doesnt form H2
is this right? ( i know theyre not balanced and capital letters are in wrong place im just trying to do it quickly)
mg + 2h20(l) -->mg(OH)2 + H2
because my teacher taught me that it only does this:
mg + H20(g) --> MgO+H2
and that only MgO + H2O forms Mg(OH)2
however, im wondering if mg forms mg(oh)2 when it reacts with liquid water too? or only if magnesium oxide and water forms mg(oh)2
this is the same for sodium:
na +H20(l) --> naoh + h2
but na2O + h2o --> also forms NaOH but doesnt form H2
is this right? ( i know theyre not balanced and capital letters are in wrong place im just trying to do it quickly)
(edited 5 months ago)
Original post by miac0328
does magnesium react with liquid water to form magneisum hydroxide?
mg + 2h20(l) -->mg(OH)2 + H2
because my teacher taught me that it only does this:
mg + H20(g) --> MgO+H2
and that only MgO + H2O forms Mg(OH)2
however, im wondering if mg forms mg(oh)2 when it reacts with liquid water too? or only if magnesium oxide and water forms mg(oh)2
this is the same for sodium:
na +H20(l) --> naoh + h2
but na2O + h2o --> also forms NaOH but doesnt form H2
is this right? ( i know theyre not balanced and capital letters are in wrong place im just trying to do it quickly)
mg + 2h20(l) -->mg(OH)2 + H2
because my teacher taught me that it only does this:
mg + H20(g) --> MgO+H2
and that only MgO + H2O forms Mg(OH)2
however, im wondering if mg forms mg(oh)2 when it reacts with liquid water too? or only if magnesium oxide and water forms mg(oh)2
this is the same for sodium:
na +H20(l) --> naoh + h2
but na2O + h2o --> also forms NaOH but doesnt form H2
is this right? ( i know theyre not balanced and capital letters are in wrong place im just trying to do it quickly)
Yes, magnesium reacts with liquid water BUT only slowly.
This is an experiment that I often do.
Beaker of water with a few drops of indicator solution.
Inverted filter funnel.
Inverted test-tube full of water over the filter funnel.
Magnesium ribbon under the filter funnel.
Leave for 1 week.
Bubble of hydrogen collects in test tube & phenolphthalein indicator turns red.
Mg + H2O ==>> Mg(OH)2 + H2
Magnesium hydroxide is only sparingly soluble so it's only weakly basic
actual photo
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