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diff --git a/main.tex b/main.tex
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--- a/main.tex
+++ b/main.tex
@@ -614,7 +614,7 @@ Se (gray) & 221 & 685 & Hexagonal & Photocells, glass \\
 
 \textbf{H$_3$PO$_3$} (Phosphorous acid)
 
-\textbf{Structure:} \chemfig{H-[:30]P(=[2]O)(-[:-90]OH)(-[:150]OH)}
+\textbf{Structure:} \chemfig{H-[:30]P(=[2]O)(<[:300]OH)(<:[:-20]OH)}
 
 \textbf{Valence:} P is +3
 
@@ -628,7 +628,7 @@ Se (gray) & 221 & 685 & Hexagonal & Photocells, glass \\
 
 \textbf{H$_3$PO$_4$} (Phosphoric acid)
 
-\textbf{Structure:} \chemfig{HO-[:30]P(=[2]O)(-[:-30]OH)(-[:90]OH)}
+\textbf{Structure:} \chemfig{HO-[:30]P(=[2]O)(<[:300]OH)(<:[:-20]OH)}
 
 \textbf{Valence:} P is +5
 
@@ -668,7 +668,7 @@ Se (gray) & 221 & 685 & Hexagonal & Photocells, glass \\
 
 \textbf{HClO$_3$} (Chloric acid)
 
-\textbf{Structure:} \chemfig{H-O-[:30]Cl(=[2]O)(-[:-30]O)}
+\textbf{Structure:} \chemfig{H-O-[:30]Cl(=[2]O)(=[:-30]O)}
 
 \textbf{Valence:} Cl is +5
 
@@ -682,7 +682,7 @@ Se (gray) & 221 & 685 & Hexagonal & Photocells, glass \\
 
 \textbf{HClO$_4$} (Perchloric acid)
 
-\textbf{Structure:} \chemfig{H-O-[:30]Cl(=[2]O)(=[6]O)(-[:-30]O)}
+\textbf{Structure:} \chemfig{HO-[:30]Cl(=[2]O)(=[:300]O)(=[:-20]O)}
 
 \textbf{Valence:} Cl is +7
 
@@ -739,7 +739,7 @@ Se (gray) & 221 & 685 & Hexagonal & Photocells, glass \\
 
 \textbf{H$_5$IO$_6$} (Periodic acid)
 
-\textbf{Structure:} \chemfig{HO-[:18]I(-[:90]OH)(-[:162]OH)(-[:234]OH)(-[:-90]OH)}
+\textbf{Structure:} \chemfig{I(=[2]O)(<:[:30]OH)(<[:-30]OH)(<:[:150]OH)(<[:210]OH)(-[:270]OH)}
 
 \textbf{Valence:} I is +7