Describe or write a formula indicating how to prepare 10 ml

Describe or write a formula indicating how to prepare 10 ml of a 1% (w/v) Toluidine Blue solution from powdered Toluidine Blue and distilled water.

Solution

1% represents 1g of the stain in 100 ml of distilled water, so here we need 10ml of stock, right!

1 x 10 / 100 = 0.1g

Take, by weighing 0.1 g of Toluidine Blue powder and dissolved in distilled water and makeup to 10ml. By this you can prepare 1% Toluidine Blue stain solution .