To keep fruit from turning brown you can sprinkle any type of citrus juice on the fruit such as lemon juice, lime juice or orange juice.
The fruit juices contain citric acid, which slows down the chemical reaction and prevents browning of the fruit.
You can also soak the fruit in a salt water solution for 10 minutes and then drain and store the fruit.
Wrapping the fruit in plastic wrap can also prevent the fruit from browning by preventing air from touching the fruit.
Lemon juice keep fruit from turning brown by lowering the pH of the fruits surface.
To keep your fruit from turning brown coat the fruit with some lemon juice which is acidic.
Toss the fruit in some lemon juice and the lemon juice will lower the pH of the fruit's surface which prevents it from browning.
You can also soak the fruit in two tablespoons of honey diluted with one cup of water to prevent the fruit from turning brown.