Chemical Change Lab Report

1239 Words5 Pages
Introduction Chemical change is when new chemical substances are made through change, with bonds between molecules being made or broken. To find whether there has been any chemical change in substances there are many signs, the most common 5 being colour change, an odour, change in temperature, gas being changed and the formation of a solid. Baking uses a wide range of techniques to create products, including chemical reaction, often through baking powder. Baking powder has a formula of NaHCO_3+H^+→Na^++CO_2+H_2 O, reacting when it is exposed to heat. This happens because when the molecules heat up, the heat gives them energy, which makes them collide and create a chemical reaction. NaHCO3 is baking soda, also known as sodium hydrogen…show more content…
Tip onto a floured board. Knead lightly and cut or roll them out. Put in the oven. Cook for 20 minutes. The recipe was repeated with half the amount of baking powder, double the amount of baking powder and no baking powder. Another ¼ cup of milk was added as well to make the mixture into a proper dough. Results Test number Recipe variation (Independent variable) Observations (Dependent variable) Inferences Control 2 tsp baking powder 2cm The scone increased in size because it contained baking powder. Test 1 0 tsp baking powder 1cm The scone only increased in size a small amount because it had no baking powder. Test 2 1 tsp baking powder 1cm The scone only increased in size a small amount because it only contained 1tsp of baking powder. Test 3 4 tsp baking powder 2.5 cm The scone increased is size a fair amount because it contained large amount of baking powder. The original height of the scones was the same for each of the four tests. In the Control, the scones rose 2cm with 2 tsp of baking powder. With no baking powder, the scones in Test 1 still rose 1cm. The scones with 1 tsp of baking powder, in Test 3, rose 1cm as well. In Test 3, the scones rose 2.5cm with 4 tsp of baking

More about Chemical Change Lab Report

Open Document