10-Pack Unknown Composition Potassium Hydrogen Phthalate Samples, 100g Each, Varying Purities 20-65% Chemical_Standard Buffer Basic 15-slide set pairs common

Basic 15-slide set pairs common plant and animal tissue preparations for short-unit microscopy coursework in middle school and early high school

Bobbin-wound coil for the demountable transformer with panel-mount 4mm sockets and an enclosed earth connection

and pendulum period measurements during physics motion investigations

7 oz with a removable threaded brass hook

and stirrer

10-Pack Unknown Composition Potassium Hydrogen Phthalate Samples, 100g Each, Varying Purities 20-65% Chemical_Standard Buffer Basic 15-slide set pairs commonUsed 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.