Lakmus
Lakmus er et farvestof, der udvindes fra forskellige lavarter. Lakmus anvendes som pH-indikator, enten som pulver, der opløses i vand, i form af væske eller s
Lakmus er et farvestof, der udvindes fra forskellige lavarter. Lakmus anvendes som pH-indikator, enten som pulver, der opløses i vand, i form af væske eller som lakmuspapir. Lakmus er blåt i en basisk opløsning og rødt i en sur opløsning. Lakmuspapir fås både rødt og blåt.
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