Hypothesis: If more yeast is added to the mixture then there will be more carbon dioxide created to make the balloon bigger. Variables: Independent Variable: Yeast Dependant Variable: Carbon Dioxide Controlled Variables: Water and Sugar Materials: - Yeast - Sugar - 125ml Erlenmeyer Flask - 4” balloon (Deflated) - Luke warm water - Masking Tape Method: 1. Measure out 5g yeast, 20g of sugar, ad 120ml of luke warm water (Less than 100 degrees F) 2. Place yeast, sugar and water in a 125ml Erlenmeyer Flask. 3.
INTRODUCTION: Acids Acids are any chemical compound that, when dissolved in h2o (water) gives a solution with the pH below 7.0. Acids are sour, they also destroy chemical properties of bases. Acids conduct an electrical current through them. Common Acids Acetic acid is found in vinegar. Vinegar is used for cooking things, treating jellyfish stings and pickling.
Steps in the Mentos in Pop Experiment Soda and Mentos Volcano This is the classic experiment. It requires a couple Mentos and a 2-liter bottle of soda. Directions: Remove the lid from the bottle and the paper and foil wrappers from the Mentos. Drop a couple Mentos into the bottle. This will cause the "eruption" and you should see a 3- or 4-foot plume of bubbly cola.
Balance 1 balloon Weighing paper 125 ml flask 50 ml graduated cylinder 5g baking soda 15ml vinegar First the mass of the empty flask and balloon is recorded. Next, 15ml of vinegar is poured into the flask then it is measured. 5g of baking soda is put into the balloon. While La’kendra holds the flask, Bobby puts the open end of the balloon over the flask while keeping the baking soda from entering the flask. The whole system is weighed and the mass is recorded.
Aim: | The aim of this experiment is to analyse a sample of vinegar and determine it’s concentration. | | | Hypothesis: | It’s expected that the aceatic acid will have the concentration of 0.1mol as this is the molarity of the NaOH as they have a 1:1 ratio of moles as it states in their chemical equations. | | | Apparatus: | * 1 x retort stand * 1 x retort burette clamp * 1 x burette * 1 x pipette * 1 x glass funnel * 2 x Conical Flasks * Sheet of filter paper * 200mL of 0.1 mol L-1 NaOH * 200mL of acetic acid of unknown concentration | | | Procedure: | 1. WARNING: Wear safety glasses and gloves! 2.
When baking soda is combined with moisture and an acidic ingredient, the resulting chemical reaction produces bubbles of carbon dioxide that expand under oven temperatures, causing baked goods to rise. Baking powder contains sodium bicarbonate, but it includes the acidifying agent already (cream of tartar), and also a drying agent (usually starch). The ultimate goal is to produce a tasty product with a pleasing texture. Baking soda is basic and will yield a bitter taste unless countered by the acidity of another ingredient, such as buttermilk. Cookie recipes typically include baking
The bomb is filled to about 20 atm of pressure with O2, sealed, and placed in a known amount of water. An electric current is passed through a wire to ignite the mixture. As the combustion takes place, the heat evolved raises the temperature of the calorimeter and its surrounding water, as measured by a thermometer. In order to prevent heat loss from the calorimeter system, some calorimeters are surrounded by a second water bath, whose temperature is continuously adjusted
4) Swirl the flask in circular movements to mix the substances. 5) Put the flask under the buret of NaOH solution, make sure the buret’s tip is inside the flask’s opening 6) Observe and record the initial volume of the NaOH buret. Note the markings on the buret. 7) Begin the titration by twisting the lever on the side of the buret until small drops come out. Keep swirling the solution until a pink color is visible throughout from the phenolphthalein.
The cleaners are all bases. One way an acid is different from a base is bases are slippery while acids are not. Also, some/most acids are ok to eat while most bases are not edible. The third was an acid is different from a base is an acid reacts with most metals and a base reacts with most oils and greases. The strongest acid that I tested in my house was the lemon juice.
Put the open end of the measuring cylinder upside down, filled with water, in the water 4. Put one end of the tube into the measuring cylinder 5. Put 20cm3 of hydrochloric acid into the boiling tube 6. Add the marble chips into the hydrochloric acid and put the other end of the tube with the rubber stopper, onto the boiling tube allowing all gas through the tube 7. Stir the solution by making a circle motion with the tube