An unknown substance turns methyl orange solution red. This shows that the substance is a base. is water. is an acid. is an alkaloid.

Which statement describes evidence of a chemical reaction? a) ice melting eliminate b) water boiling c) lighting a match d) grape juice freezing

Drag each label to the correct location on the chart. classify each reaction as endothermic or exothermic.

How many mmols of tris-hcl are there in 100 ml of a 100 mm tris-hcl buffer solution at ph 8.1? note that the 100 mm refers to the sum of tris and tris-hcl concentrations?