In my experiment I am testing which vegetable and pickling solution will increase the acidity in the solution most and have the most chemical change. To figure this out you need to consider some important factors. These factors are how acidity changes, chemical changes, and how acidity is measured. These factors really impact how we would measure and see the results. What is acidity? It’s the amount of acid in a substances, for example vinegar and other liquids. Acid is a molecule which donates proton and can receive other electrons. That means that an acid can change its chemical properties. If the acidity in the solution changes it is because of the change of protons and neutrons. If the acidic solution loses a proton then it will become …show more content…
The formation of an odor is when chemical changes create a smell. For example when something rots it usually smells disgusting. Temperature change happen sometimes because chemical changes are normally accompanied by it. For example if you burn paper it will become much hotter. The formation of bubbles is another sign of chemical change, for example when you mix baking soda and vinegar it creates many bubbles. Finally formation of a solid may form, called precipitate. All in all chemical changes may have occurred if you observe some of these five factors. Acidity is measured using a few different ways, such as indicator sticks which change color when dipped into a liquid. Then when the color is changed you normally compare it to a scale. The most common scale used is named the pH scale where 7 is neutral and 14 is most basic (least acidic), and 0 most acidic. An example of something neutral is water, a basic solution is liquid drain cleaner, and something most acidic is battery acid. The vegetables which I am using to conduct this experiment are cucumbers, carrots, and beets. The beets and the carrots are more on the neutral side whereas cucumbers are more acidic. Overall you need indicator sticks and then you compare it to a scale to figure out the acidity of the solution. Ultimately when conducting this experiment I need to look at how to determine chemical change and how to measure
to get an idea of how I would do my real experiment and what apparatus
Most substances fall on a scale ranging from the most acidic to the the most basic with neutral substances falling somewhere in the middle. Scientists call this the pH scale. pH levels are measured in numbers,0 to 14. The closer a substance is to zero the more acidic it would be. The closer to 14 the more basic a substance would be.Now what defines an acid and a base, one might ask? There are three ways of defining acids, each singling out a specific property. The first theory is the Arrhenius Theory with states, that an acid is a substance that produces the ion H+ when in a water solution, while a base is a substance which produces the ion OH- when in a water solution. Examples of an Arrhenius acid are HCl and HNO3. Examples of an Arrhenius base are NaOH and AlOH3.
Planning Firstly here is a list of equipment I used. Boiling tubes Weighing scales Knife Paper towels 100% solution 0% solution (distilled water) measuring beakers potato chips Cork borer. We planned to start our experiment by doing some preliminary work. We planned to set up our experiment in the following way.
Acid rain has been proven to have damage forests, fresh waters and soils, killing insect and aquatic life-forms. It also causes damage to buildings and impacts on human health. Many people do not know what acid rain actually is. Acid rain is any form of precipitation that is unusually acidic, low pH levels, higher than normal amounts of sulfuric and nitric acid, occurs naturally and from man made sources. Forms when gases react in the atmosphere with water, oxygen, and other chemicals (what is acid rain?). The only water that will not have some amount of acidity is pure water. Pure water has a pH of 7 which is neutral; regular, unpolluted rain water has a pH of around 5.6. The acidity in rain water comes from the presence of Carbon Dioxide, Nitrogen Oxide, and Sulfur Dioxide. CO2 reacts with water to form carbonic acid. Nitrogen and water react during lightning storms, forming Nitric Oxide. NO is then oxidized to form N02. The NO2 reacts with water to form nitric acid. Due to this, the pH is lowered to be slightly acidic (Acid Rain). Acid rain can occur naturally in the environment, but the problem occurs when human interaction is the cause of the acidic levels.
Acidity is a measure of the ph or hydrogen ion potential in a solution, if something is more acidic than it can give more hydrogen ion to other substances. A pH scale is how much a substance is willing to receive or give hydrogen ion. Substances that are very acidic are close to 0 on the pH scale. Substances that are close to 14 on the pH scale are called bases. Tannins are compound which are in grapes, they make wine taste drier and feel drier in someone's mouth. Tannins are used in color dyeing and because of this they can stain cotton fabric more quickly and more deeply. Cotton is porous which means the wine can go in it more deeply. A porous surface is a surface with many small openings. You can prevent red wine from staining with someone that would cover or fill in the porous which wouldn't let the wine absorb as deeply. Stains are
For this experiment, you will add the measured amount of the first sample to the measured amount of the second sample into its respectively labeled test tube then observe if a reaction occurs. In your Data Table, record the samples added to each test tube, describe the reaction observed, if any, and whether or not a chemical reaction took place.
Also, I will know what a chemical and physical property is and I will know how to find them out. Materials = == == ==
Acid-Base balance is the state of equilibrium between proton donors and proton acceptors in the buffering system of the blood that is maintained at approximately pH 7.35 to 7.45 under normal conditions in arterial blood. It is important to regulate chemical balance or homeostasis of body fluids. Acidity or alkalinity has to be regulated. An acid is a substance that lets out hydrogen ions in solution. Strong acid like hydrochloric acid release all or nearly all their hydrogen ions and weak acids like carbonic acid release some hydrogen ions.
It changes from blue to red with acids but loses its colour in the presence of certain chemicals, one of which is vitamin C. DCPIP solution can be used to test for the presence of vitamin C in foods. Hypothesis Orange juice has the highest content of vitamin C. Citrus fruits have a higher content of vitamin C. The orange and lemon juice contain more vitamin C than the pineapple juice. Furthermore, as lemons are more acidic than oranges, I predict that the orange juice will contain more vitamin C than the lemon juice. Vitamin C affects, the ph the more vitamin C the higher the ph. Variables Independent Variables Different fruit juices (Pineapple, orange and lemon).
A chemical change involves a creation of a new substance, but a physical change doesn’t involve any creation of any substance. For example, if a piece of chalk drops on the floor and separates into a few small pieces, it’s a physical change, because only the shape of the chalk changed, but no new substance is involved, but if a piece of sodium drops into water, gas comes out, and causes a “pop” sound, that is a chemical change because gas has been formed when sodium dropped in the water. Hypothesis = == ==
Dofasco uses hydrochloric acid to remove scale, oxides and other impurities that form on the surface of hot-rolled steel coils in a finishing process-a pickling line. Hot-rolled iron moves through baths of hydrochloric acid to remove impurities that form on the surface of the steel during the manufacturing process. The acid is used as a substance to create a clean-surfaced product. Hydrochloric acid is a clear, colorless, solution with a strong odour made of hydrogen chloride ions and water. This acid is highly corrosive and is used for many industrial purposes such as the pickling process. It is highly reactive, which is why it works efficiently to remove impurities off the surface of steel when it reacts with the steel. During the hot rolling of the
Ellycia R Harrould-Kolieb and Dorothée Herr co-wrote the article Ocean Acidification and Climate Change: Synergies and Challenges of Addressing both under the UNFCCC which was published in the 2012 Journal of Climate Policy. The article describes how the release of climate-change-causing carbon dioxide into our atmosphere is causing ocean acidification but through international policies the effects of ocean acidification can be mitigated.
vii. This would allow the determination of the percentage of citric acid in the lemon juice specifically, rather than the total acidity. The results of this could have been compared to those of the titration, and the contribution of citric acid to the overall initial acidity could have been determined.
So what exactly is matter? Matter is anything that has mass and takes up space (blue book). The particle model, however, is different for the four types of matter. For solids, the molecules can only vibrate, but solids have a definite shape and volume. For liquids the molecules are able to slide past one another and has definite volume. Both gas and plasma don't have a definite shape or volume, but in gas the molecules can move freely and bump into each other, and in plasma the molecules have completely broken apart. These molecules are too small to see and are different for every object. So what do particles have to do with vinegar and baking soda reacting? Well acids and bases are made of elements. These elements are made of atoms which are made of molecules. So when you get down to it, the reaction between acids and bases all depend on the particles of the object.
has on the rate of reaction. I will do this by recording the time it