What does phenolphthalein do to the body?
What does phenolphthalein do to the body?
Phenolphthalein has been found to inhibit human cellular calcium influx via store-operated calcium entry (SOCE, see Calcium release activated channel § Structure). This is effected by its inhibiting thrombin and thapsigargin, two activators of SOCE that increase intracellular free calcium.
What is the pH of phenolphthalein?
As an indicator of a solution’s pH, phenolphthalein is colourless below pH 8.5 and attains a pink to deep red hue above pH 9.0.
What Colour is a neutral solution?
Universal indicator
| pH range | Description | Colour |
|---|---|---|
| 3–6 | Weak acid | orange or yellow |
| 7 | Neutral | Green |
| 8–11 | Weak alkali | Blue |
| > 11 | Strong alkali | Violet or Indigo |
What Colour does phenolphthalein turn in water?
Phenolphthalein is an indicator — a chemical which changes colour depending on whether it meets an acid or a base. It turns purple if it meets something basic, such as ammonia; it stays colourless if it meets an acid like vinegar or a neutral substance like water.
What Colour does pH paper turn in neutral solutions?
paper green
What are the 5 properties of acids?
Acids
- Aqueous solutions of acids are electrolytes, meaning that they conduct electrical current.
- Acids have a sour taste.
- Acids change the color of certain acid-base indicates.
- Acids react with active metals to yield hydrogen gas.
- Acids react with bases to produce a salt compound and water.
What are 5 properties of acids and bases?
Chemistry
| Property | Acid | Base |
|---|---|---|
| Taste | Sour (vinegar) | Bitter (baking soda) |
| Smell | Frequently burns nose | Usually no smell (except NH3!) |
| Texture | Sticky | Slippery |
| Reactivity | Frequently react with metals to form H2 | React with many oils and fats |
What are the 4 properties of acids and bases?
What are four properties of acids? Of bases? Acids taste sour, react with metals, react with carbonates, and turn blue litmus paper red. Bases taste bitter, feel slippery, do not react with carbonates and turn red litmus paper blue.
What are the 3 properties of acids?
Acids
- Aqueous solutions of acids are electrolytes, meaning that they conduct an electrical current.
- Acids have a sour taste.
- Acids change the color of certain acid-base indicators.
- Acids react with active metals to yield hydrogen gas.
What is acid and its properties?
Acids are ionic compounds that produce positive hydrogen ions (H+) when dissolved in water. Acids taste sour, conduct electricity when dissolved in water, and react with metals to produce hydrogen gas. Certain indicator compounds, such as litmus, can be used to detect acids.
What is acid and its types?
There are two basic types of acids organic and inorganic acids. Inorganic acids are sometimes referred to as mineral acids. The main difference between the two is the presence of carbon in the compound; inorganic acids do not contain carbon. Inorganic acids – Inorganic acids are often termed mineral acids.
What are the properties and uses of bases?
Bases taste bitter, feel slippery, and conduct electricity when dissolved in water. Indicator compounds such as litmus can be used to detect bases. Bases turn red litmus paper blue. The strength of bases is measured on the pH scale.
What are 5 uses of bases?
What are the uses of Bases
| Bases | Uses |
|---|---|
| Sodium hydroxide | In the manuacture of soaps, textile, paper, medicines In the refining of petroleum |
| Ammonium hydroxide | As a reagent in the laboratory In making fertilizers, rayon, plastics and dyes |