an indicator is what type of compound
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pH indicator A pH indicator is a halochromic chemical compound added in small amounts to a solution so the pH (acidity or basicity) of the solution can be determined visually. Hence, a pH indicator is a chemical detector for hydronium ions (H3O+) or hydrogen ions (H+) in the Arrhenius model. Normally, the indicator causes the color of the solution to change depending on the pH. Indicators can also show change in other physical properties; for example, olfactory indicators show change in their odor. The pH value of a neutral solution is 7.0.
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indicator indicator in·di·ca·tor (ĭn'dĭ-kā'tər) n. One that indicates, especially a pointer or an index. An instrument used to monitor the operation or condition of an engine, an electrical network, or another physical system; a meter or gauge. The needle, dial, or other registering device on such an instrument.
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- Acid-base-indicators: A graphic view. A pH indicator is a halochromic chemical compound added in small amounts to a solution so the pH (acidity or basicity) of the solution can be determined visually. Hence, a pH indicator is a chemical detector for hydronium ions (H 3 O +) or hydrogen ions (H +) in the Arrhenius model.cid-base-indicators: A graphic view. A pH indicator is a halochromic chemical compound added in small amounts to a solution so the pH (acidity or basicity) of the solution can be determined visually. Hence, a pH indicator is a chemical detector for hydronium ions (H 3 O +) or hydrogen ions (H +) in the Arrhenius model.
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AcidBase: Indicators Many indicators are extracted from plants. For example, red cabbage juice and tea pigments show different colors when the pH is different. The color of tea darkens in a basic solution, but the color becomes lighter when lemon juice is put into a tea.
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- Indicators change color gradually across a pH range, and it is common for one of the indicator's forms to be colorless. Since indicators are weak acids, care should be taken to avoid adding too much indicator (more than 3 to 4 drops per 100-mL) to a solution of acid or base.
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- Click for larger image. Acid and Base Indicators. Acid-Base Indicators: The most common method to get an idea about the pH of solution is to use an acid base indicator. An indicator is a large organic molecule that works somewhat like a  color dye. Whereas most dyes do not change color with the amount of acid or base present, there are many molecules, known as acid-base indicators, which do respond to a change in the hydrogen ion concentration.
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- In the methyl orange case, the half-way stage where the mixture of red and yellow produces an orange colour happens at pH 3.7 - nowhere near neutral. This will be explored further down this page. Phenolphthalein Phenolphthalein is another commonly used indicator for titrations, and is another weak acid.t couldn't distinguish between a weak acid with a pH of 5 or a strong alkali with a pH of 14. Choosing indicators for titrations Remember that the equivalence point of a titration is where you have mixed the two substances in exactly equation proportions.
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- A compound variable is a symbol name that does not start with a digit or period, but contains one or more periods. In addition, the last character is not a period, when the symbol contains only one period. An example of a compound variable is: isPrime.X.Y.
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compounds Obi is trying to determine if a powdery, solid substance is an element or a compound. After recording some observations, he strongly heats a sample of the solid over a burner flame. After fifteen minutes, he turns off the flame and allows the sample to cool. He records his final observations in the data table.
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- By Anne Marie Helmenstine, Ph.D. A compound is a chemical substance made up of two or more elements. Here is a list of examples of compounds made up of exactly two elements. 1  H 2 O-water. 2  NaCl-sodium chloride or table salt. 3  KCl-potassium chloride. 4  HCl-hydrochloric acid. 5  N 2 O-nitrous oxide. 6  AgI-silver iodide. 7  AlN-aluminum nitride.
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Color Change Chemistry Experiments A pH indicator can be used to make water appear to change into wine or blood. Tetra Images, Getty Images. pH indicators are extremely useful for color change chemical reactions. For example, you can use phenolphthalein indicator to make water appear to turn into blood or wine and back to water (clear - red - clear).
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Jeep aims to appeal to 'Renegade in each of us' 110 CONNECTTWEET 5 COMMENTEMAILMORE. Jeep is aiming to capture the attention of hip, young buyers by using the the song Renegades by X Ambassadors to promote its new Jeep Renegade SUV with a new 60-second commercial that will debut nationally today.
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- A compound is a substance made from two or more elements that have reacted chemically with each other. Remember this definition as you might need it in the exam! A compound is a completely new material that will often have totally different properties from the elements that made it. For example The element sodium is a highly reactive metal. The element chlorine is a yellow-green poisonous gas (non-metal). When the two react together they form a compound called sodium chloride.
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- HOW DO pH INDICATORS WORK? pH indicators detect the presence of H+ and OH-. They do this by reacting with H+ and OH-: they are themselves. weak acids and bases. If an indicator is a weak acid and is coloured and its conjugate base has a different. colour, deprotonation causes a colour change.
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- When an acid is dissolved in water we get an acidic solution, and alkalis make alkaline solutions. If a solution is neither acidic nor alkaline we call it neutral. Pure water is neutral, and so is paraffin. Indicators are substances that change colour when they are added to acidic or alkaline solutions.You can prepare homemade indicators from red cabbage or beetroot juice-these will help you see if a solution is acidic or alkaline. Litmus and universal indicator are two indicators that are commonly used in the laboratory.ndicators are substances that change colour when they are added to acidic or alkaline solutions. You can prepare homemade indicators from red cabbage or beetroot juice-these will help you see if a solution is acidic or alkaline. Litmus and universal indicator are two indicators that are commonly used in the laboratory.
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What is Microblading? What is Microblading? Microblading is a form of permanent makeup for eyebrows that was founded in the 90’s in Asia. It is known under several names such as eyebrow embroidery, feathering, microstroking etc. Microblading is basically a group of in line needles that at the hands of the artist are dipped in pigment and “glided”through the skin creating a hair like line.
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- Every compound absorbs a characteristic set of colors of light. This absorption spectrum is a chemical fingerprint for detecting the presence of that compound. When the compound is altered in a chemical reaction, the fingerprint will change-and so the color of the reacting mixture may change, as the reaction progresses. (For a more detailed explanation of why color change accompanies some chemical reactions, see Water to Wine).
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Universal Indicator Definition By Anne Marie Helmenstine, Ph.D. Definition: A universal indicator is a blend of pH indicator solutions designed to identify pH of a solution over a wide range of values. Color change is used to identify pH values. The most common universal indicators are: red 0 ≥ pH ≥ 3. yellow 3 ≥ pH ≥ 6.
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INDICATOR a number or ratio (a value on a scale of measurement) derived from a series of observed facts; can reveal relative changes as a function of time.
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- Click for larger image. Acid and Base Indicators. Acid-Base Indicators: The most common method to get an idea about the pH of solution is to use an acid base indicator. An indicator is a large organic molecule that works somewhat like a  color dye. Whereas most dyes do not change color with the amount of acid or base present, there are many molecules, known as acid-base indicators, which do respond to a change in the hydrogen ion concentration. Most of the indicators are themselves weak acids. The most common indicator is found on litmus paper.
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Review of Elements, Compounds, and Mixtures The shorthand notation for a compound describes the number of atoms of each element, which is indicated by a subscript written after the symbol for the element. By convention, no subscript is written when a molecule contains only one atom of an element. Thus, water is H 2 O and carbon dioxide is CO 2.
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- Prostate enlargement is very common as men age. Symptoms of prostate enlargement usually develop around age 50. By age 60, most men have some degree of BPH. At age 85, men have a 90% chance of having urination problems caused by BPH.
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- Experiments using the indicator dye Indo-1 were used to demonstrate several hardware features, in addition to the ability to measure another calcium indicator dye. The dye Indo-1 has the characteristic that its emission wavelength is different in the presence of free Ca2+ than in the absence.
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Universal indicator A universal indicator is typically composed of water, propan-1-ol, phenolphthalein sodium salt, sodium hydroxide, methyl red, bromothymol blue monosodium salt, and thymol blue monosodium salt. The colours that indicate the pH of a solution, after adding a universal indicator, are: The colours from yellow to red indicate an acidic solution, colours light blue to dark blue indicate bases and green colour indicates that a solution is neutral.
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- Magic Pitcher Demonstration: Phenolphthalein is an indicator of acids (colorless) and bases (pink). Sodium hydroxide is a base, and it was in the pitcher at the beginning, so when added to the phenolphthalein in beakers 2 and 4, it turned pink (top half of the graphic).niversal Indicator, which is a solution of a mixture of indicators is able to also provide a full range of colors for the pH scale. A variety of indicators change color at various pH levels. A properly selected acid-base indicator can be used to visually indicate the approximate pH of a sample.