An acid is 0-6 on the pH scale (0 being strong and 6 being weak) , while bases are 8-14 on the pH scale (8 being weak and 14 being strong.) When an acid and a base are mixed together, a salt and water will always be made. When a weak acid and a strong base are mixed together the salt produced will be basic. Likewise, when a strong acid and a weak base are mixed together the salt produced will be acidic.