Fast-acting baking powder dissolves rapidly in liquid and begins acting right away.

If left standing for a few minutes, the powder is penetrated by water and dissolves more easily.

This powder dissolved in the gasoline, but would not burn.

The microscopic powder dissolved into his bloodstream and sped to his heart.

After stirring the water to make sure the powders dissolved, he went to the back door to get the crabs.

The powder dissolved into the water easily, turning it a milky moonstone color.

'We were sceptical about packets, though, and didn't think all the powder would dissolve, but it seems to be fine.'

Let the vial stand until the powder completely dissolves (up to 45 minutes).

Then he took a pencil from his pocket, stirred the wine until the powder had dissolved, and replaced the stopper.

Now, let this powder dissolve upon your tongue; it will ease the pain.