# data[].attributes.body
This is a chemical reaction because the precipitate of silver chloride is created once silver nitrate and sodium chloride are combined. When silver cations encounter chloride anions, they form the silver chloride.

# data[].attributes.body
An Alka-Seltzer tablet contains aspirin, sodium bicarbonate, and citric acid. When placed in water the sodium bicarbonate and citric acid react with each other to form bubbles of carbon dioxide gas or "fizz".

# data[].attributes.body
Milk becoming sour is a chemical change because once it is left out in room temperature bacteria forms in the milk, and it becomes sour. This change cannot be undone, therefore, it is a chemical change.

# data[].attributes.body
This is a chemical reaction due to the new foamy substance that is created. This is when hydrogen peroxide, dish soap, and a yeast water solution are combined. The yeast contains an enzyme that breaks down the hydrogen peroxide into oxygen, gas, and water. The oxygen gets trapped by the soap, and as a result a large foamy solution is created.

# data[].attributes.body
When leaves change colors, it occurs because the change in temperature during winter causes the trees to cut off supply of water to the leaves. This process is called abscission. With less water, photosynthesis stops, and so does the integration of chlorophyll, one of the pigments in leaves. This then causes the leaf to take the color of the other pigments in the leaf, carotene and anthocyanins (yellow and red) and then we see a change in color.

# data[].attributes.body
Lead nitrate solution contains particles of lead and potassium iodide contains particles of iodide. When the solutions mix, the lead particles and the iodide particles combine to form a new substance, lead iodide, which is a yellow solid.

# data[].attributes.body
An instant cold pack is an ice pack that is made of two bags; a bag containing water, which is inside a bag containing ammonium nitrate, calcium ammonium nitrate or urea. When the inner bag of water is broken by squeezing the package, it is allowed to dissolve the solid in an endothermic reaction. This reaction absorbs heat from the surroundings, quickly lowering the pack's temperature.

# data[].attributes.attachment_link.title
The chemistry of cold packs - John Pollard

# data[].attributes.body
When fruit ripens, it emits an aroma. This is because when an apple is either plucked or has a wound, it causes the production of new enzymes that act on the chemicals present in the fruit. This then causes the apple begins to emit an aroma.

# data[].attributes.body
Fireworks are made up of burning compounds, such as metal nitrates. When you light a firework, a combustion reaction takes place, causing the formation of new compounds, along with the emission of heat and light energy. Therefore, it's a chemical change.

# data[].attributes.body
When the wood reaches a certain degree, the heat decomposes some of the material that makes up the wood. Some of the decomposed material is released as volatile gases, or smoke.The rest of the material forms char, which is all of the unburnable minerals in the wood.

# data[].attributes.body
Rusting is the breakdown of the metal iron. The reactants of this chemical reaction are iron, water, and oxygen, and the product is iron oxide, better known as rust. Rust, unlike iron, is crumbly and orange. The nail was originally silver but after rusting it is now orange.

# data[].attributes.body
Adding vinegar to baking soda is an example of a chemical change where sodium bicarbonate (baking soda) is reacted with acetic acid and water (vinegar) releasing carbon dioxide and making sodium acetate. This produces the fizz, or bubbles which is truly just the carbon dioxide gas being released.