Section 1: Introduction and Guiding Question Atoms are tiny particles that compose to make up matter. The atoms combine to create bonds. The bonds are substances that can go through physical and chemical changes. Chemical reactions can happen when two substances combine. Different mixtures of substances create different types of reactions. When reactions happen, the atoms rearrange and break apart. The atoms never get misplaced or taken away, due to the law of conservation of mass. The law of conservation of mass explains how mass cannot be created or destroyed in a physical or chemical change. How does the total mass of the substance formed as a result of a chemical reaction compare to the total mass of the original substance? Scientists are trying …show more content…
The materials used during the experiment included Sodium Hydroxide, Copper Nitrate, a beaker, a pipette, a test tube, a graduated cylinder, a digital scale, gloves, and goggles. The scientist put the goggles and gloves on for safety and the scientist began the experiment. First, the scientist set the graduated cylinder on the digital scale. Then, the scientist pressed zero on the digital scale. While the graduated cylinder is still on the digital scale, the scientist measured ten milliliters of Sodium Hydroxide into the graduated cylinder. The scientist recorded the mass of the Sodium Hydroxide in the data table. After the mass gets recorded, the scientist takes the graduated cylinder off the scale, while the Sodium Hydroxide remains in the graduated cylinder. Next, the scientist took the beaker and the test tube and placed the two materials on the digital scale. The scientist pressed the zero on the digital scale to zero out the scale. While the materials stay on the scale, The scientist took the pipette and filled the pipette up with Copper Nitrate. The scientist poured the Copper Nitrate into the test tube