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hclo4 acid or base or salt
is hclo4 an acid or base
is hclo4 a strong acid or base
hclo2 acid or base or salt
hclo4 strong or weak acid or base
hclo acid base or salt
is hclo4 a salt
hclo4 acidic or basic
is hclo4 an acid
is hclo4 a base
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