Keywords: Nonmetals – Oxygen – Combustion – Nonmetal oxides

Keywords: Reaction rate – Chemical reactions – Rate of reaction – Variables

Unit one: chemical reactions. Lesson one: chemical reactions.Keywords (English): mercury oxide – thermal decomposition – mercury – oxygen

Unit one: chemical reactions. Lesson one: chemical reactions.Keywords (English): copper hydroxide – thermal decomposition – heating – oxides

Unit one: chemical reactions. Lesson one: chemical reactions.Keywords (English): copper carbonate – heating – decomposition – carbon dioxide

Unit one: chemical reactions.  Lesson one: chemical reactions.Objective: To study the thermal decomposition of copper sulfate.Materials: Copper sulfate _ Spoon _ Bunsen burner _ Test tubeSteps: Heat a small amount of blue copper sulfate in a test tube using a Bunsen burner.Observation: A black......

Unit one: chemical reactions.  Lesson one: chemical reactions.Keywords (English): thermal decomposition – sodium nitrate – heat – oxides – thermal reaction

Unit one: chemical reactions. Lesson one: chemical reactions.Keywords (English): silver nitrate – sodium chloride – white precipitate – precipitation reaction

Keywords: Chemical reaction – Reactants – Products – Change

Purpose of experimentPreparation of carbon dioxide gas in the laboratorytoolsgraduated flask - glass beaker - cork stopper with two holes - glass funnelU-shaped glass tube - dilute hydrochloric acid - calcium carbonatesteps Place the candle in the middle of the lab bench.Light the candle by usi......

Keywords: Equation balancing – Chemical equilibrium – Reactants – Products – Atoms

Keywords: Metals – Acids – Hydrogen – Chemical reaction

Keywords: Chemical properties – Metals – Oxidation – Oxides

Unit One: Chemical Reactions. Lesson two: the speed of chemical reactions.Keywords (English): reaction rate – time – reactants – products – chemistry

Formation of SaltKeywords (English): salt formation – ionic reaction – crystallization

Keywords: Displacement reaction – Iron – Copper sulfate – Copper precipitation – Chemical change

Keywords: Nitrogen gas – Preparation – Reaction – Products – Laboratory

Keywords: Nitrogen – Salts – Chemical reaction – Analysis

Keywords: Nitrogen gas – Preparation – Reaction – Products – Laboratory

Keywords: Ammonia gas – Ammonia – Preparation apparatus – Odors – Bases

Keywords: Ammonia – Hydrogen chloride – White vapor – Gas combination

The process of oxidation and reduction according to the traditional conceptKeywords (English): oxidation – reduction – electron loss – electron gain – redox reactions

Experiment Description:This experiment demonstrates the ability of certain metals, particularly alkali metals, to displace hydrogen from water. When small pieces of these metals are added to water, a rapid chemical reaction occurs, producing hydrogen gas and causing a noticeable increase in temperat......

Keywords: Metals – Acids – Hydrogen – Chemical reaction

Keywords: Chemical reactions – Daily life – Change – Energy

Keywords: Properties – Substances – Chemical reaction – Before reaction – After reaction – Changes

Keywords: Chemical reaction – Precipitate – Reactants – Products – Chemical change – Observation

Objective: To distinguish between a mixture and a compound through the reaction of iron and sulfur.Materials: Two dishes – stirring tool – boiling tube – test tube holder – sulfur powder – iron filings – steel wool – magnet.Steps: Place some iron filings in a glass beaker, add yellow sulfur powder,......

Objective: To identify the effect of temperature on chemical changes and observe milk spoilage when left at room temperature.Materials: Small glass cup, equal amounts of milk.Steps: Pour equal amounts of milk into two small cups. Place the first cup in the refrigerator. Leave the second cup on a kit......

Keywords: Bunsen burner – Flame – Heating – Safety – Laboratory

Unit One: Chemical Reactions. Lesson two: the speed of chemical reactions.Keywords (English): concentration – reaction rate – reactants – collision frequency

Unit One: Chemical Reactions. Lesson two: the speed of chemical reactions.Keywords (English): surface area – reaction rate – reactants – collisions

Objective To observe the effect of temperature on the rate of a chemical reactionTools Two glasses with equal amounts of water, one hot and one cold Two effervescent tabletsSteps Place one tablet in the hot water and the other in the cold water Compare the rate of fizzing in both glassesObservation......

Unit One: Chemical Reactions. Lesson two: the speed of chemical reactions.Keywords (English): enzymes – reaction rate – catalysts – biochemistry

Keywords: Chemical change – Reaction – Reactants – Products – Evidence

the goal:Explanation of how we can infer a chemical change has occurred.Materials and tools:Ammonia solution - Distilled water - Glass beaker - Universal indicator - Effervescent tablets.Steps:1- Put a quantity of distilled water in the glass.2- Add drops of ammonia solution into the water in the gl......

How can the reaction rate be increased?reaction rate – catalysts – temperature – concentration – surface area

Keywords: Chemical reaction – Reactants – Products – Change

Objective: To identify indicators of a chemical reaction by observing the temperature change when vinegar reacts with steel wool.Materials: Steel wool ball – Vinegar – Glass cup – Thermometer.Steps: Place a steel wool ball in a glass cup. Pour vinegar over the steel wool and let it sit for 1–2 minut......

Keywords: Tools – Equipment – Laboratory – Chemical experiments – Identification – Safety

Objective: To distinguish between reversible and irreversible reactions.Materials: Candle – white paper – egg – ice cubes – sugar – butter – heat source – heat-resistant container – tongs.Procedure: Observe each material before heating. Heat each material gradually and record the changes. Cool each......

Objective: To study a spontaneous redox reaction between zinc metal and copper sulfate solutionMaterials: Zinc plate _ Copper sulfate solution CuSO4 _ Glass beaker _ Forceps _ Glass rodSteps: Pour copper sulfate solution into a beaker Immerse the zinc plate in the solution Observe the surface and co......

Objective: To identify the essential materials required for rust formation in ironMaterials: Steel wool – glass containers – lidProcedure: Place a piece of steel wool in each container and label them (1, 2, 3) In container 1, add a small amount of water to cover part of the steel wool and leave it u......

Objective: To investigate the effect of a soft drink on an iron nail and observe the changes that occur over timeMaterials: Iron nail – glass cup – soft drinkSteps: Observe the appearance of the iron nail before starting the experiment Pour enough soft drink into the glass cup Drop the nail into the......