What can you mix together to make a chemical reaction besides vinegar and baking soda?

Here are a few examples of chemical reactions that can be observed by mixing different substances:

1. Hydrogen Peroxide and Potassium Iodide: Mixing hydrogen peroxide (H2O2) with potassium iodide (KI) in the presence of a catalyst such as copper(II) sulfate or manganese dioxide results in the evolution of oxygen gas. The reaction can be represented as:

2 H2O2 (aq) + 2 KI (aq) → 2 H2O (l) + 2 KOH (aq) + O2 (g)

2. Sodium Bicarbonate and Citric Acid: Mixing sodium bicarbonate (NaHCO3) with citric acid (C6H8O7) in water produces carbon dioxide gas, resulting in effervescence and the formation of bubbles. The reaction can be represented as:

NaHCO3 (aq) + C6H8O7 (aq) → CO2 (g) + Na3C6H5O7 (aq) + H2O (l)

3. Calcium Chloride and Sodium Sulfate: Mixing calcium chloride (CaCl2) and sodium sulfate (Na2SO4) in water leads to the formation of a solid precipitate of calcium sulfate (CaSO4) and sodium chloride (NaCl) in the solution. The reaction can be represented as:

CaCl2 (aq) + Na2SO4 (aq) → CaSO4 (s) + 2 NaCl (aq)

4. Copper Sulfate and Sodium Hydroxide: Mixing copper sulfate (CuSO4) with sodium hydroxide (NaOH) in water results in the formation of a blue-colored precipitate of copper hydroxide (Cu(OH)2). The reaction can be represented as:

CuSO4 (aq) + 2 NaOH (aq) → Cu(OH)2 (s) + Na2SO4 (aq)

5. Potassium Permanganate and Sulfuric Acid: Mixing potassium permanganate (KMnO4) with concentrated sulfuric acid (H2SO4) leads to the formation of manganese sulfate (MnSO4) and the release of oxygen gas. This reaction is highly exothermic and should be performed with caution. The reaction can be represented as:

2 KMnO4 (aq) + H2SO4 (aq) → MnSO4 (aq) + K2SO4 (aq) + H2O (l) + 5 O2 (g)

These are just a few examples, and there are numerous other chemical reactions that can be observed by mixing different substances. It's important to exercise caution when conducting experiments and always follow safety guidelines to ensure your safety.