Silicates as the base of the Earth crust Silica and compounds derived from it, silicates, constituteca. 90% of the Earth crust substances. Silica gives rise to a beautiful meterial-glass. Nobody knows exactly how glass was discovered. There is a well-favoured story related to phoenician sailors who fused occassionally sea sand and soda ash. It is likely that they discovered the secret of "liquid glass" (LGL) sodium metasilicate (Na_(2)SiO_(3)) soluble in water. Write down equation of a reaction between aqueous of CuSO_(4) and sodium metasilicate (LGL). Take into account the pH values of aqueous solutions of the salts.

Silicates as the base of the Earth crust Silica and compounds derived

1.	Silicates as the base of the Earth crust Silica and compounds derived from it, silicates, constituteca. 90% of the Earth crust substances. Silica gives rise to a beautiful meterial-glass. Nobody knows exactly how glass was discovered. There is a well-favoured story related to phoenician sailors who fused occassionally sea sand and soda ash. It is likely that they discovered the secret of "liquid glass" (LGL) sodium metasilicate (Na_(2)SiO_(3)) soluble in water. Write down equation of a reaction between aqueous of CuSO_(4) and sodium metasilicate (LGL). Take into account the pH values of aqueous solutions of the salts.
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