instruction:
Given a passage and a query based on the passage, generate an unambiguous, concise and simple answer to the query from information in the passage. Note that the answer may not be present in exact form.
question:
Testing for the presence of proteins - Biuret test . Show students the available foods for testing. Ask them which ones they expect to contain protein. Demonstrate to students how to perform the test. Put a food item containing protein into a test tubes (i.e. milk or tofu). If it is not a liquid, add some water and mash it well. Also set up a control, a test tube containing a liquid that does not contain protein (i.e. water). Add about 2ml of Biuret reagent to the test tube. 1. If the food to be tested is liquid, go to 2. If the food to be tested is solid, make an extract. Grind crush or chop a small amount and put into a test tube to a depth of about 2cm. Add a similar amount of distilled water and stir with a glass rod. Allow to stand for a few minutes. 2. Draw up some of the clear liquid into a pipette and then First, prepare test solution by grinding vitamin C reagent tablet into a powder using a mortar and pestle or back of a spoon. Pour powder into dropper bottle and add 30ml (1 oz.) of distilled water. If testing more than one liquid, label each test tube with a marker. Fill each with 50 drops of blue vitamin C indicator solution. Nutrient solutions to be tested (made from foods you wish to test for sugar, starch, protein, fat, and vitamin C content). Food Test 1: Sugar test-Benedict's solution Benedict's solution is used to test for simple sugars, such as glucose. Put different food solutions in each cup, e.g. corn starch in water, flour in water, milk, and water. Using the dropper, add a drop or two of the iodine solution to each cup. Place a slice of a potato on a paper towel atop a paper plate and add a drop of the iodine solution to the potato slice. Note the color change. Place foods in separate test tubes. if the food is liquid, pour enough to just cover the bottom of the glass. If the food is solid (e.g., banana, apple, potato chips), crush a small amount and add. enough water to cover the bottom of the tube. Iodine test for starch the most followed method to analyze the presence of starch in the given food material. When iodine solution is mixed with starch it turns from brown to dark blue. As this happens with very small amounts of starch, iodine test is a sensitive one. Testing for starch. Glucose is sweet and dissolves in water while starch is not sweet and does not dissolve well in water. A further test to distinguish starch from glucose is to shine a beam of light through 'solutions' of each. This is also called the Tyndall Beam Effect. Dispersal only happens in starch as the large starch molecules are big enough to affect the light. This is a physical test. A chemical test for starch is to add iodine solution (red) and see if it turns blue/black in colour. It is possible to distinguish starch from other carbohydrates using this iodine solution test. For example, if iodine is added to an peeled potato then it will turn black. You could demonstrate the effect of iodine solution on starch by adding a few drops of solution to a starch powder or starch suspension in a boiling tube. You can then discuss the fact that this colour change might be hard to see in a dark green leaf until the chlorophyll is removed. The iodine turned from a red/yellow colour to a blue-black colour. The iodine turned from a red/yellow colour in certain places to a blue-black colour, where starch is stored. The iodine turned from a red/yellow colour to a blue-black colour. Query: how do you test for starch in a food
answer:
Put different food solutions in each cup, e.g. corn starch in water, flour in water, milk, and water. Using the dropper, add a drop or two of the iodine solution to each cup. Place a slice of a potato on a paper towel atop a paper plate and add a drop of the iodine solution to the potato slice. Note the color change.

question:
Hydrogen ion (H 3 O +) as a flattened pyramid . Hydrogen ions. Hydrogen ions are molecular ions with the formula H 3 O + (H 2 O) n, formed by the addition of a proton to one or more water molecules. The ionic product, K w. pH Hydroxide ions Grotthuss mechanism . The structure and dynamics of the hydrogen ion in water have been reviewed . how do hydronium ions form. when a hydrogen ion, H+, separates from the acid and bonds with a water molecule, H2O, to form H3O+. What are some properties of acids. sour taste, corrosive, most of them are poisonous, reacts with metals to form hydrogen gas, conduct electric current. Hydronium is what you get when you put water and hydrogen ions together, forming H 3 O +. Hydronium is the simplest form of oxonium, which is any ion that contains the trivalent oxygen cation. Hydronium is also known as hydroxonium. As with many species in chemistry, the nomenclature isn't the same everywhere. Where would you find hydronium? Hydronium is found in interstellar clouds and in the tails of comets. A hydronium ion is formed when a positively charged hydrogen ion bonds with a molecule of water through a coordinate covalent bond. In this coordinate covalent bond, the oxygen from the water... A hydronium ion is formed when a positively charged hydrogen ion bonds with a molecule of water through a coordinate covalent bond. An acid does not itself contain hydronium, which is formed when an acid reacts with water. If you meant how to reduce the hydronium in an acidic water solution, you would simply add a base. For i... so, they will form H3O+ that is less stable from H2O and more stable than H+... H3O+ stays between the H2O and H+ its the best act they can do to achieve stabilization... hopes thats help... When a protic acid is added to water, it releases a hydrogen ion (H+) (also called aproton because a hydrogen atom missing one electron is nothing but a proton!). However, H+ will not stay a free ion, and instead immediately combines with a nearby water molecule (H2O) to form the hydronium ion, H3O+. Assorted References. 1 major reference (in acidbase reaction: Hydrogen and hydroxide ions) (in acidbase reaction: Dissociation constants in aqueous solution) 2 occurrence in soil (in soil: Mineral content) 3 particle accelerators (in particle accelerator: Generating particles) 4 pH measurement (in chemical analysis: pH determinations) A hydronium ion is written as H3O+. It is formed when something else donate a proton, or H+, to a water molecule. The H+ will easily bond to one of the two lone pairs of electrons around the water ... The resulting hydronium ions are few and short-lived. pH is a measure of the relative activity of hydronium and hydroxide ions in aqueous solutions. In acidic solutions, hydronium is the more active, its excess proton being readily available for reaction with basic species. The hydronium ion is very acidic: at 25 C, its pK a is 0. It is the most acidic species that can exist in water (assuming sufficient water for dissolution): any stronger acid will ionize and protonate a water molecule to form hydronium. Query: how does the hydronium ion form
answer:
A hydronium ion is formed when a positively charged hydrogen ion bonds with a molecule of water through a coordinate covalent bond.

question:
How long points stay on your license Why we recommend you fight your traffic ticket How we can help you get a restricted license if you have 4 points or more in one year Q: How long do the points stay on my record? A: Any points assessed will stay on your record for a period of two years. If you accumulate a total of 12 points in a two-year period beginning on the date of the first conviction, your driver's license will be suspended for a period of six months. You do have a right to appeal this suspension, but you will need to file the appeal before the suspension date listed on the letter of suspension that you got from the Bureau of Motor Vehicles. No. Driving records are confidential and are provided only to those authorized by law. Insurance companies, employers, transit authorities, volunteer organizations, and school districts who get a copy of your driving record may not reveal your information to a third party. Will my record show the original date my WA driver license was issued? Only if your first license was issued after May 1, 1964. If it was issued before May 1, 1964, you may email us to request a status letter showing the original issue date: exams@dol.wa.gov. What information is kept on a driving record and for how long? 1 Please note that the above is different for how long points last. Points on your record only count for DMV purposes for 18 months from the date of offense, and a conviction counts for insurance purposes for 36 months from the date of conviction. These two period, of course, are different that the period of how long the conviction actually appears on your driving record. DMV points are your driving record's version of splinters, bothersome and annoying until finally removed. How long the points remain on your driving record depends on your state. Alabama: Two years. Alaska: Two points are reduced for every year of violation-free driving. Arizona: Three years. Arkansas: Three years. California: Three years. Secretary of State. Tickets remain on your record for a minimum of seven years, depending on the type of license and the type of ticket(s) received. Alcohol and controlled substances related driving convictions remain on your record for life. Also keep in mind, 4 DMV points acquired in a 12 month period will result in the DMV sending you a letter informing you that your license will be suspended for 6 months for acquiring too many DMV points. 1 WARNING About Paying Off A Ticket. Many times people when they get a traffic ticket just pay it off. There are some violations that qualify for immediate loss of driving privileges, even if you only commit them once, such as: 1 Driving while intoxicated (DWI) 2 Driving more than 15 MPH over the speed limit, if you are driving faster than 55 MPH. 3 Prearranged racing with another motorist. Suspensions or revocations of a driver license remain on a driver's record for four years from the date the suspension or revocation was terminated. Note we are talking about four years from the date of termination of the suspension or revocation, not the date it started. As long as convictions remain on the driver record, the points for those convictions remain available to determine whether 12 or more points have accumulated in any 12-month period. The violation dates, not the conviction dates, are used in that determination. For example: you receive a traffic citation and do not go to court for two years. When the court does report the conviction, points are counted from the date of the violation. If the conviction causes you to accumulate 12 points in any 12-month period, your operating privilege will be suspended. Query: how long does a ticket stay on your license for?
answer:
Tickets remain on your record for a minimum of seven years.