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What type of change occurs when a new substance is formed that has different properties from the original substance?
A chemical change occurs when a new substance is formed with different properties from the original substance. This change involves the rearrangement of atoms and the formation of new chemical bonds. It is typically irreversible.
Is adding HCl to Mg a physical change?
No, adding hydrochloric acid (HCl) to magnesium (Mg) and observing the formation of magnesium chloride (MgCl2) is a chemical change because it involves the formation of new chemical substances with different properties.
How could you prove to someone that the dissolving was a physical to change not a chemical change?
You can demonstrate that dissolving is a physical change by showing that the chemical composition of the substance remains the same before and after dissolving. This can be done by evaporating the solvent and obtaining the original substance in its solid form. Chemical changes involve a change in the chemical composition of the substances involved, leading to the formation of new substances, which is not the case in dissolving.
When a substance gives off or absorbs heat is that a sign that describes a sign of a chemical change occurring?
Yes, if a substance gives off or absorbs heat, it could be a sign that a chemical change is occurring. This process is known as an exothermic or endothermic reaction, respectively, which are common indicators of chemical reactions.
Phsical or chemical change?
there are two changes in matter: physical change and chemical change. physical change means the change in size, shape, texture and any other physical characteristics, but no any new substance made or added. while in chemical change, there's a change in the object's physical appearance but also made a new substance.
What type of change occurs when a new substance is formed that has different properties from the original substance?
A chemical change occurs when a new substance is formed with different properties from the original substance. This change involves the rearrangement of atoms and the formation of new chemical bonds. It is typically irreversible.
Could the identity stay the same in chemical change?
No. If one substance does not change into another, it is not a chemical change.
What sensory evidence could be used to argue that a chemical transformation of the substance had occurred?
by a change in smell and appearence of a substance
Is adding HCl to Mg a physical change?
No, adding hydrochloric acid (HCl) to magnesium (Mg) and observing the formation of magnesium chloride (MgCl2) is a chemical change because it involves the formation of new chemical substances with different properties.
When silver coins are found in ancient shipwreck's they are coated with a black crust What question could you decide whether the silver underwent a chemical or physical change?
You would need to know if the silver underwent change that left the silver as it was originally, (in this case, having a black substance attach to it) or a change that made the silver into a new substance (like tarnishing). If the silver is still the same before and after the change, it was a physical change. If the substance is changed into a different substance after the change, it is a chemical change.
Examples of chemical changes of a substance?
There are several ways to detect chemical changes in a substance. 1. Change in color (usually) 2. Bubbles fizz from substance (gas is produced) 3. Change in temperature (surrounding temperature in air DOES NOT influence change in substance's temperature) 4.
How could you prove that grinding a bar of iron into a powder is not a chemical change?
Grinding a bar of iron into a powder is a physical change, not a chemical change. This is because the iron is still the same substance, just in a different physical form. No new substances are formed during the grinding process, demonstrating that it is a physical change.
What Three Things can happen when a Chemical Reaction occur?
A chemical reaction can change a substance into a solid, liquid, or gas. It may cause a substance to explode or could cause no change at all.
When you mix a pink powdered substance in water and mix it is that a chemical change?
Mixing is not itself a chemical change. There could be one occurring as a result, but nothing you described indicated any kind of chemical change.
How could you prove to someone that the dissolving was a physical to change not a chemical change?
You can demonstrate that dissolving is a physical change by showing that the chemical composition of the substance remains the same before and after dissolving. This can be done by evaporating the solvent and obtaining the original substance in its solid form. Chemical changes involve a change in the chemical composition of the substances involved, leading to the formation of new substances, which is not the case in dissolving.
What sensory evidence could be used to argue that a chemical transformation of a substance had occurred?
Sensory evidence of chemical reactions may be: - Change of color - Change of odor - Change of aspect - Change of the temperature - A violent reaction with explosion or fire - Bubbling - Emitting a sound - Emitting a light
When sugar dissolves in water how can you tell it's not a chemical change?
There is no new product being formed, eg. its just sugar plus water. It's not like a new substance is being formed. For example a chemical change could be Iron and oxygen, which forms something new, which is Iron Oxide. Get it?? :)
