Press "Enter" to skip to content

What is the color of the indicator thymol blue in?

Answer is (2) – blue. Thymol blue is a pH indicator which 3 colors according to the pH.

What is the color of the indicator thymol blue in a solution that has a pH of 12?

Indicator pH Range Alkali
34 Thymol blue (1st range) 1.2-2.8 yellow
34.1 Thymol blue (2nd range) 8.0-9.6 blue
33 Thymolphthalein 9.3-10.5 blue
35 Trinitrobenzene 12-13.4 orange

How do you make bromophenol blue indicator?

BROMOPHENOL BLUE INDICATOR, 1% Dissolve 5.0 g of bromophenol blue powder (tetrabromophenolsulfonphthalein) in 74.5 mL of 0.1 N sodium hydroxide (NaOH) solution. Dilute with purified water to 500 mL. Color and pH range: yellow 3.0-4.6 blue.

How do you use Bromothymol blue indicator?

Bromothymol blue is used to measure the pH of solution based on the color change of the solution. It is prepared by dissolving bromothymol blue powder in sodium hydroxide and then diluted in water and possibly alcohol. In basic conditions it is blue while acidic conditions it is yellow.

What is bromophenol blue used for?

Bromophenol Blue is a pH indicator, and a dye appearing as a strong blue color. It is often used as a tracking dye during agarose or polyacrylamide gel electrophoresis.

What Colour is bromophenol blue?

Indicators Acid Colour Range
Bromophenol blue yellow 3.0 – 4.6
Congo red blue 3.1 – 4.9
Methyl orange red 3.2 – 4.4
Bromocresol green yellow 4.0 – 5.6

Is bromophenol blue positive or negative?

Bromophenol blue, Orange G, and xylene cyanol each have a negative charge at neutral pH, whereas methylene blue has a positive charge at neutral pH.

Is bromophenol blue hazardous?

Not a dangerous substance according to GHS. Inhalation May be harmful if inhaled. May cause respiratory tract irritation. Skin May be harmful if absorbed through skin.

Why does thymol blue have 2 different pH ranges?

Because it has two protons that can dissociate, thymol blue also has two pKa values: one at a pH of ½(1.2+2.8)=2.0 and the other at a pH of ½(8.0+9.6)=8.8.

What process caused the liquids to change from blue to yellow?

The process that caused the color change is called cellular respiration. During this process, the snail exhales carbon dioxide, which combines with water to form a weak carbonic acid, which in turn changes the color of the water from blue to yellow.

How would you explain the change in the color of distilled water Bromothymol blue solution when CO2 was introduced in it?

When carbon dioxide reacts with water, a weak acid (carbonic acid) is formed (see chemical reaction below). The more carbon dioxide you breathe into the BTB solution, the faster it will change color to yellow.

Does your body breathe out CO2?

The Role of the Respiratory System is to breathe in oxygen and breathe out carbon dioxide. This is known as respiration. The cells of the body use oxygen to perform functions that keep us alive. The waste product created by the cells once they have performed these functions is carbon dioxide.

What can be inferred from the color change of the Bromothymol blue solution?

What is the mechanism driving the bromothymol blue solution color change? Bromothymol blue solution is an indicator that changes color in the presence of a weak acid or base. So release of carbon dioxide into water which turns into a weak acid. Therefore the cellular respiration is the driving the color change.

What must be present for aerobic respiration to occur?

Cellular respiration can occur both aerobically (using oxygen), or anaerobically (without oxygen). During aerobic cellular respiration, glucose reacts with oxygen, forming ATP that can be used by the cell. Carbon dioxide and water are created as byproducts. In cellular respiration, glucose and oxygen react to form ATP.

How does a germinated bean produce carbon dioxide?

The process of cellular respiration converts sugar and oxygen and other substances into ATP, water, and carbon dioxide gas. Therefore, carbon dioxide gas production is evidence of cellular respiration in germinating seeds.

What is the purpose of soaking beans before you cook them?

Soak: Soaking beans before cooking helps to remove some of those indigestible sugars that cause flatulence. There are two simple ways to get the job done: Cook: Put beans into a large pot and cover with 2 inches of water or stock. (Don’t add salt at this point since that slows the beans’ softening.)