Chemlab notes stoichiometry skin#

You will have to use appropriate equipment to measure the sodium carbonate and the hydrochloric acid. Gather the items in the materials list except the chemicals-get them just before you’re ready to use them. Share your result and show your work to your teacher for approval before moving on. Work with your lab partner to carry out this calculation correctly. In your lab notebook use this information to predict the mass of carbon dioxide that will be produced when this amount of acid reacts. The 50 mL of hydrochloric acid solution, if measured very precisely, contains 3.5 g of HCl. Compare your work with your lab partner’s.

Use the equation written in the Overview as a model and be sure you have correct chemical formulas before you balance the equation. In your lab notebook write and balance the chemical equation that describes the reaction between sodium carbonate and hydrochloric acid. The data will be gathered together by your teacher so that the class will be able to produce a total of four or five trials total. Then you will get together with another pair of students to carry out the reaction and perform the experiment. You will work with one partner on your plans.

Wash hands thoroughly with soap and water before leaving the laboratory.

Call a physician immediately if ingested.

Hydrochloric acid solution is slightly toxic by ingestion.

Chemlab notes stoichiometry skin#

If it splashes onto skin or into eyes then rinse continuously with water.

Hydrochloric acid solution is corrosive to skin and eyes.

If in eyes, rinse with cold water as soon as possible. Avoid contact and wash hands after handling it.

Sodium carbonate is a strong base when dissolved in water and can cause irritation of the skin.

If in eyes, rinse with cold water for up to 15 minutes.

Solid powdered sodium carbonate is an eye and respiratory tract irritant.

If you choose not to wear safety glasses you are choosing to sit.

Specifically, you should find that your measurement is within a half a gram or less of your prediction. If all goes well then the numbers should be very close to one another. Then you will perform the reaction in the lab in such a way as to measure how much carbon dioxide is produced. By using molar ratios from the balanced chemical equation you will be able to predict the amount of carbon dioxide that will form. In this lab you will take a known amount of hydrochloric acid and react it with excess sodium carbonate. Stoichiometry is the technique of using the molar ratios in balanced chemical equations to calculate the amount of reactants or products. A gas will bubble up and out of the reaction mixture and cause it to have a smaller total mass than it did before the reaction. These notations are included to show that a gas forms in the reaction. The notation ( s) means solid and ( g) means gas.

In the chemical equation above the notation ( aq) means ‘aqueous’, that is, dissolved in water.

The products will be the same (with the exception of the ionic compound that forms) as for the reaction shown above. In this lab you will write and balance an equation for the reaction of sodium carbonate with hydrochloric acid. washing soda), and sodium bicarbonate (a.k.a. Here are a few examples of carbonates: caclium carbonate (a.k.a. These chemicals are known collectively as carbonates. Other chemicals will react with an acid in the same way.