Real life example: The cut surface of an apple turns brownish after exposed to the air for a while.ī) Is is exothermic or endothermic? Explain.Ģ) Given the oxidation-reduction reaction :įe (s) + CuSO 4 (aq)→ FeSO 4 (aq)+ Cu (s)Ī) Which element is the oxidizing agent and which is the reducing agent?ī) How do the oxidation states of these species change?ĪgNO 3 (aq) + KBr (aq) → AgBr (s) +KNO 3 (aq)Ĥ) 2 HNO 3 (aq) + Sr(OH) 2 (aq) → Sr(NO 3) 2 (aq) +2 H 2O (l)Ī) In this reaction, which species is the acid and which is the base?Ĭ) If 2 moles of HNO3 and 1 mole of Sr(OH)2 are used, resulting in 0. Melting point:- It is the temperature at which a. Physical changes can be irreversible or reversible. Physical changes typically impact the state of matter. In science, physical changes of matter are when the look, feel, or smell of it changes, but the chemical properties do not. Temperature:- It is related to the hotness or coldness of the system. Use examples of physical changes to discover common things being altered in everyday life. Solubility:- it is related to the mixing of one compound into the other. Flammability:- it is related to the burning of the compound. Matter cannot be created or destroyed even when it changes. Some examples of chemical properties are the ripening of the fruit, Burning of the paper. Chemical properties are seen either during or following a reaction since the arrangement of atoms within a sample must be disrupted for the property to be investigated. An example of a chemical change is wood burning. A chemical property is a characteristic or behavior of a substance that may be observed when it undergoes a chemical change or reaction. \), a \(H_2\) molecule donates electrons to \(F_2\) resulting in two \(HF\) molecules Chemical changes are changes in the makeup and chemical properties of matter.
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