Aspirin, an acetyl derivative of salicylic acid, is a white, crystalline, weakly acidic substance, with a melting point of 136 °C (277 °F), and a boiling point of 140 °C (284 °F).
Table of Contents
What are unique chemical properties of aspirin?
Acetylsalicylic acid binds to and acetylates serine residues in cyclooxygenases, resulting in decreased synthesis of prostaglandin, platelet aggregation, and inflammation. This agent exhibits analgesic, antipyretic, and anticoagulant properties.
Does aspirin yield carbon dioxide and water vapor when burned?
Aspirin yields carbon dioxide and water vapor when burned.
Which of the following is a chemical property quizlet?
Chemical properties include flammability, reactivity, heat of combustion, and toxicity.
Is aspirin a strong or weak acid?
Aspirin is a weak acid and it tends to ionize (give up a H atom) in an aqueous medium at high pH. Drugs do not cross biological membranes when they are ionized. In a low pH environment like the stomach (pH =2), aspirin is predominantly unionized and crosses membranes into the blood vessels readily.
What are the functions of aspirin?
Aspirin is used to reduce fever and relieve mild to moderate pain from conditions such as muscle aches, toothaches, common cold, and headaches. It may also be used to reduce pain and swelling in conditions such as arthritis. Aspirin is known as a salicylate and a nonsteroidal anti-inflammatory drug (NSAID).
How do you characterize aspirin?
Aspirin, or acetylsalicylic acid (ASA), is a derivative of salicylic acid (SA) that is used as an analgesic (reduces and prevents pain) and antipyretic (reduces or prevents fever) medication. It is probably the most commonly used over-the-counter medication.
Which of the following is a chemical form of aspirin?
The chemical name of Aspirin is Acetylsalicylic Acid (ASA).
Why does aspirin need to be dissolved in water?
Instructions for taking aspirin by mouth: This helps avoid the aspirin irritating the stomach. ️ Soluble or dispersible aspirin tablets should be dissolved in a small glass of water before taking. ️ Gastro-resistant aspirin tablets have a special coating that helps protect the stomach from the medicine.
What happens to the aspirin if it is heated too long in the presence of water?
Let’s briefly review. Aspirin is a pain reliever and fever reducer, but if it’s allowed to react with water then it can undergo hydrolysis, forming salicylic acid and acetic acid, which is no longer effective. This reaction can occur under acidic or basic conditions.
Why is water used as a solvent in recrystallization of aspirin?
Because aspirin is less soluble in cold water. In fact, aspirin is not very soluble in water at all, which is why you are supposed to take it with lots of water. You are not “chilling the aspirin”, you are preventing it from dissolving too much so that you have a better yield of your product.
Which of the following is a physical property?
Physical properties include color, density, hardness, and melting and boiling points.
Which is not an example of a physical property?
Color, phase, odor and boiling point are the physical properties. Reactivity with oxygen depends on the chemical nature of object, thus, it is not a physical property.
Which of the following is an example of physical property?
Familiar examples of physical properties include density, color, hardness, melting and boiling points, and electrical conductivity. We can observe some physical properties, such as density and color, without changing the physical state of the matter observed.
Is aspirin an acid base or salt?
4.6 Acid–Base Reactions For example, aspirin is an acid (acetylsalicylic acid), and antacids are bases.
What kind of acid is in aspirin?
The Chemistry of Aspirin (acetylsalicylic acid) Aspirin is prepared by chemical synthesis from salicylic acid, through acetylation with acetic anhydride. The molecular weight of aspirin is 180.16g/mol. It is odourless, colourless to white crystals or crystalline powder.
What is another name for aspirin?
Aspirin is a generic drug sometimes referred to as acetylsalicylic acid (ASA). It is an NSAID that treats inflammation and prevents the formation of blood clots.
What are the four actions of aspirin?
Aspirin causes several different effects in the body, mainly the reduction of inflammation, analgesia (relief of pain), the prevention of clotting, and the reduction of fever.
What is the mode of action of aspirin?
He proved that aspirin and other non-steroid anti-inflammatory drugs (NSAIDs) inhibit the activity of the enzyme now called cyclooxygenase (COX) which leads to the formation of prostaglandins (PGs) that cause inflammation, swelling, pain and fever.
What does aspirin stand for?
1899: Acetylsalicyclic acid is named Aspirin by Bayer. The letter ‘A’ stands for acetyl, “spir” is derived from the plant known as Spiraea ulmaria (meadowsweet), which yields salicin, and “in” was a common suffix used for drugs at the time of the first stable synthesis of acetylsalicylic acid.
Is there salt in aspirin?
This medicine contains a large amount of sodium (more than 500 mg in each tablet). Unless otherwise directed by your doctor, do not take more of this medicine than is recommended on the package label. If too much is taken, serious side effects may occur.
What is the effect of aspirin when it is stored in moist atmosphere?
Answer: Aspirin is stable in dry air, but readily hydrolyzes to acetate and salicylate when exposed to water or moist air. It will then exude a strong vinegar-like odor. The addition of heat will speed the rate of hydrolysis.
Is solubility a physical property?
Properties that can be determined without changing the composition of a substance are referred to as physical properties. Characteristics such as melting point, boiling point, density, solubility, color, odor, etc. are physical properties.
What is the melting point of aspirin?
The melting point range of pure aspirin is 138-140 °C and the melting point range of the salicylic acid starting material is 158-161 °C. If impurities are present in your crude sample, the melting point range for your product will be lower than the range of pure aspirin.
Can aspirin cause bleeding?
Low-dose aspirin can have serious side effects. “Usually, it causes bleeding in the gastrointestinal tract (primarily the stomach and small intestines), but bleeding can also occur in other areas of the body,” says Dr. D’Souza.