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Is a piece of chalk crushed a physical change?
Yes, crushing a piece of chalk is a physical change because the chalk is still composed of the same molecules before and after being crushed. The change in appearance is only due to the physical state of the substance.
Is making chalk dust a chemical change?
No, it is a physical, not chemical change.
Is breaking a lump of chalk to make powder a chemical reaction?
Breaking a lump of chalk into powder is a physical change, not a chemical reaction. The chemical composition of the chalk remains the same before and after breaking it into powder.
Is pulverized chalk a physical or chemical change?
Grinding chalk to chalk dust is a physical change because the texture and size may change but the its molecules are still the same.An example of chemical change is burning paper because ash is chemically different from paper.
Is mixing crushed chalk with water a chemical or physical change?
Definitely chemical. I can tell because when I do it, it lets off a sulfur smell, indicating that hydrogen sulfide has been released. I've run the same test with other acids and come up with similar results, only the residue left behind after evaporation is different. The hydrogen must be bonding with the sulfur inside the chalk and creating that strong smell (more noticeable if you use a odorless acid). Did you know that pure elemental sulfur is odorless? The true chemical you smell is hydrogen sulfide, not plain sulfur.
Is a piece of chalk crushed a physical change?
Yes, crushing a piece of chalk is a physical change because the chalk is still composed of the same molecules before and after being crushed. The change in appearance is only due to the physical state of the substance.
Is making chalk dust a chemical change?
No, it is a physical, not chemical change.
Is breaking a lump of chalk to make powder a chemical reaction?
Breaking a lump of chalk into powder is a physical change, not a chemical reaction. The chemical composition of the chalk remains the same before and after breaking it into powder.
Is pulverized chalk a physical or chemical change?
Grinding chalk to chalk dust is a physical change because the texture and size may change but the its molecules are still the same.An example of chemical change is burning paper because ash is chemically different from paper.
Is mixing chalk with water a physical change or chemical change?
physical :)
Is crushing a piece of chalk a chemical change or a physical change?
Crushing a piece of chalk is only a physical change. Chemically, it is still chalk.
Is mixing crushed chalk with water a chemical or physical change?
Definitely chemical. I can tell because when I do it, it lets off a sulfur smell, indicating that hydrogen sulfide has been released. I've run the same test with other acids and come up with similar results, only the residue left behind after evaporation is different. The hydrogen must be bonding with the sulfur inside the chalk and creating that strong smell (more noticeable if you use a odorless acid). Did you know that pure elemental sulfur is odorless? The true chemical you smell is hydrogen sulfide, not plain sulfur.
How does chalk change after it has been shaken?
After a piece of chalk is pounded by a fist or rolling pin or other object it normally get crushed and turns into lumpy powder.
When you hydrochloric acid and chalk together is it physical or chemical change?
When you mix hydrochloric acid with chalk, a chemical change occurs. This is because the acid reacts with the calcium carbonate in the chalk to form carbon dioxide gas, water, and calcium chloride. This is a chemical reaction that results in the formation of new substances.
What is the following is a physical property of a substance?
Chalk can be broken into pieces.
If chalk doesn't dissolve in water is it a chemical or physical change?
It is a physical change because the chalk is still chemically the same substance whether it is in solid form or dispersed in water. The molecules in the chalk are not altered by the process of being put in water.
When pounding chalk to small bits a physical change or a chemical change?
It's a physical change because it's only changing size and shape, not converting chemicals.
