What is the net charge of each; Silica tetrahedron? For each question write the

Question

What is the net charge of each; Silica tetrahedron? For each question write the chemical formula and charge Write the # of Si and O in each tetrahedron Si^+4 O^-2 Multiply # by the charge Add the charges Single chain of silica tetrahedral? Write the number of Si and O for each tetrahedron Si^+4 O^-2 Net charge: single pair (2 times single) Double chain of silica tetrahedral? Number of Si and O for each set of 4 tet Si^+4 O^-2 Net charge: set of 4 Sheet of silica tetrahedral? Number of Si and O for each pair of tetrahedral Si^+4 O^-2 Net charge pair Sheet of silica tetrahedral with every 4^th Si replaced by an Al? Number of Al, Si and O for each set of 4 tetrahedra Al^+3 si^+4 O^-2 Net charge: set of 4

Explanation / Answer

1) a) silica 1 oxygen 4

b) +4 for silica and -8 for oxygen

c) total charge -4

d) (SiO4) is the fromula and -4 is the chaarge.

2) in single chain each tetrahedra is shared between two oxygen atoms

a) silica 1 and oxygen 3

b)+4 for silica and -6 for oxygen

c) total charge -2

d) sio3 for single si2o6 for double

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