Unit 2.1
When you place a lump of sugar in water, the sugar seems to gradually to disappear. What is this called?
Dissolving
What do you call a solid that does not dissolve in water?
insoluble solid
What is the name of the image formed on the paper in chromatography?
Chromatogram
How many members are in KATSEYE?
6 members
Where was Silvino and Risa born?
Japan and Spain
What are some examples of dissolving?
Sugar in black tea, instant coffee in hot water and nail polish in nail polish remover.
How can we make a solute dissolve faster and more easily?
Increase temperature / Increase solvent amount
What do you use to separate the coloured ink?
Paper chromatography
What was their first song?
Debut
What is the name of Risa’s sister who attends this school?
Mika
What is a liquid that is not transparent called?
Opaque
Why do substances dissolve faster in hot water?
Because particles in hot water move faster.
What is chromatography used for?
Identify colours and substances in inks．
What is their latest song?
Pinky Up
How many schools has Silvino been?
5 schools
What is the substance that dissolves called and what is the substance that it dissolves into?
Solute and Solvent
What is a saturated solution?
Solution that contains the maximum amount of solute that can dissolve in a solvent
In chromatography, why might permanent marker ink not separate when using water as a solvent?
Because the ink is not soluble in water
When did KATSEYE debut?
June 28, 2024
What costume did Risa and Silvino wore in Halloween?
Risa: Nothing
Silvino: Clown
When salt is added to the water it dissolves, how can you calculate the mass of the new solution?
mass of solute+mass of solvent=mass of solution
200g of sugar dissolves in 100g of water at 20℃. How much sugar will dissolve in 5g of water at 20℃?
10g
Why do you use a pencil to draw the line in a chromatography experiment?
Because the line stays in place during the chromatography experiment.
What is one challenge Katseye may face as a global group with members from different countries?
Different languagess and cultures can make teamwork harder
Which town was Risa born in?
Saitama