Some crystals look very similar but here are a couple of ways to tell them apart. The salt may look a little grayer than the sugar which may look whiter than the salt. The alum may sparkle a little ...

Having made biscuits with an acknowledged alum baking powder, using twelve times the proportion of powder directed on the labels, and employing for each experiment a distinct sample of powder ...

It was the first time judging was back at UB since 2023. Altogether, there were over 170 crystals, each made from aluminum potassium sulfate (alum), a nontoxic compound used in water purification. “It ...

Our global experiments are a key part of our experimentation programme on Learn Chemistry, through which we support and promote practical science in new collaborative ways. Two years ago, we organised ...

“Growing crystals ... dissolving the alum in water, and then being patient as the water dissolves. Not only is “patience” one of the keys to the success of the home experiment, so is a ...