10-Pack Unknown Composition Potassium Hydrogen Phthalate Samples, 100g Each, Varying Purities 20-65% Chemical_Malonic Acid Walks students through four-stroke diesel

Walks students through four-stroke diesel operation on a 16-inch hand-cranked model

or specimens during reading and inspection

Fossiliferous limestone hand sample measures approximately 3 inches with visible shell and coral fragments for combined paleontology and sedimentary geology teaching

Stores small specimens and reagent aliquots with leak-resistant screw tops

Polished acrylic equilateral prism at 38mm length and 38mm faces

10-Pack Unknown Composition Potassium Hydrogen Phthalate Samples, 100g Each, Varying Purities 20-65% Chemical_Malonic Acid Walks students through four-stroke dieselUsed to challenge students in determining purity by titration of unknowns, this 10 pack of 100g potassium hydrogen phthalate samples ranges 20 65% purity for analytical chemistry practice.