Congo Red Indicator Solution, 1.0%, 100mL Glass Bottles_Gas Washing Bottles Powdered copper (II) sulfate pentahydrate

Powdered copper (II) sulfate pentahydrate used in crystallization experiments

stoichiometry

Before-and-after glacial landscape model on a 75 by 100 cm wall-mountable backboard

Sliding-top wooden box 5 x 2 x 1 inches with a recess sized for a pair of 100mm (4-inch) bar magnets plus their keeper

showing how inclination shifts from horizontal at the equator to vertical at the poles

Congo Red Indicator Solution, 1.0%, 100mL Glass Bottles_Gas Washing Bottles Powdered copper (II) sulfate pentahydrateUsed as a blue to red pH indicator transitioning below pH 3, this 100mL bottle of 1. 0% Congo red covers strongly acidic titrations where bromothymol blue and phenolphthalein fall out of range.