: Common laboratory alkalis include sodium hydroxide solution , ammonia solution , and calcium hydroxide . Household examples include bleach, glass cleaner, and toilet cleaner. Properties :

: Students learn to distinguish substances based on their properties. Acids typically have a sour taste (like lemons), while alkalis often feel slippery (like soap). Natural and Chemical Indicators

: Critical precautions such as wearing safety goggles and gloves, and the proper technique for diluting concentrated sulfuric acid (adding acid to water gradually). Neutralization Applications : Practical examples include:

: Used to measure the strength of acidity or alkalinity. pH < 7 : Acidic. pH = 7 : Neutral (e.g., distilled water). pH > 7 : Alkaline.