What are somecommon acids?vinegar oranges lemonshydrochloric sulfuric acid acid
Properties of Acids๏Tastes Sour๏Conducts Electricity ๏The hydronium ions in an acidic solution can carry the electric charges in a current๏Corrosive ๏They can break down certain substances. Many acids can corrode fabric, skin, and paper.
Properties of Acids๏React with metals ๏ The solutions of some acids also react strongly with certain metals. ๏ The acid-metal reaction forms metallic compounds and hydrogen gas, leaving holes in the metal in the process.
Properties of Bases๏Basic solutions feel slippery.๏Bases also taste bitter.๏Like acids, bases are corrosive. Basic solutions contain ions and can conduct electricity.๏Basic solutions are not as reactive with metals as acidic solutions are.
Where do we find Bases?soaps, ammonia, cleaning products
Where do we find Bases? The hydroxide ions produced by bases can interactstrongly with certain substances, such as dirt and grease.
a measure of how acidic or basic a solution is
pH๏The pH scale ranges from 0 to 14.๏Acidic solutions have pH values below 7.๏A solution with a pH of 0 is very acidic.๏A solution with a pH of 7 is neutral.๏Basic solutions have pH values above 7.
the reaction of an acid with a base. It is called thisbecause the properties of both the acid and base are diminished, or neutralized.
In most cases, theneutralization reactionproduces a water and a salt.
How doesneutralization occur?? ๏Recall that every water molecule contains two hydrogen atoms and one oxygen atom. ๏When one hydronium ion reacts with one hydroxide ion, the product is two water molecules. This reaction occurs during acid-base neutralization.
How doesneutralization occur?? ๏Equal numbers of hydronium ions from the acidic solution and hydroxide ions from the basic solution react to produce water. ๏Pure water has a pH of 7, which means that it’s neutral.
Funny Colours 1 2 3 4 5 6 NaOH A basic solution which will be colourless in the presence of phenolphthalein.pH 0−8.2 8.2−12.0 >12.0Conditions acidic or near-neutral basic strongly basicColor colorless pink to fuchsia colorlessNaOH NaOH
Funny Colours 1 2 3 4 5 6 HCl An acidic solution which will be colourless in the presence of phenolphthalein.pH 0−8.2 8.2−12.0 >12.0Conditions acidic or near-neutral basic strongly basicColor colorless pink to fuchsia colorless HCl
Funny Colours What made the pink colour in #2 and 4?What made the colour disappear in test tube #5?What could we use to take away the pink colour in test tube #6?