AB C D E F Do Now – Write down the given descriptions. Draw the picture that matches. 1. A pure substance – molecules only 2. Mixture – molecules and compounds.

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AB C D E F Do Now – Write down the given descriptions. Draw the picture that matches. 1. A pure substance – molecules only 2. Mixture – molecules and compounds

 Due: Remediation  Today’s Homework:  USA TestPrep  Textbook 409 & 410 #1-12, 411 #1-6  Announcement:  Happy Thanksgiving! Enjoy your 5 day weekend!

Title: Acid and Base Demo L.O. SWBAT determine if a solution is an acid, base, or neutral.

ACIDS Form Hydrogen (H + ) ions in water Taste Sour React with metals.

BASES Forms Hydroxide (OH - ) ions in water Taste Bitter Feels Slippery

Neutral Not an acid or base. Water (H 2 O) H+ ions = OH- ions

Is it an Acid or Base? Forms OH- ions. Feels Slippery. Tastes Sour. Reacts with metals. Tastes Bitter. Forms H+ ions ACID BASE ACID BASE ACID

Indicator A compound that changes color in the presence of an acid or a base.

Natural indicators There are natural indicators for acids and bases, and we may find them in our kitchen or garden! Red rose flowers Bougainvillea flowers Red cabbage Blue berries

ACIDS Litmus Paper Blue  Red Bromthymol Blue Yellow Cabbage Juice Pink/Red

BASES Litmus Paper Red  Blue Bromthymol Blue Blue Cabbage Juice Blue/Green

Neutral Solutions Litmus Paper No Change Bromthymol Blue Green Cabbage Juice Purple

pH Scale: Base Acid Neutral Measures the strength of acids and bases.

Let’s Test it Out!