# Year 5’s Marvellous Mixtures!

This week in science Year 5 were looking at what happens when we put a solid into a liquid. On Tuesday they planned, carried out and concluded an investigation into variables which affect the rate at which salt or sugar dissolve. We worked together as a class to explore this question. Some children investigated different types of sugar, others discovered whether salt or sugar dissolved more quickly. Another group worked outside with Mrs Khan and Mr Inman to put different variables to the test!

But I still have some questions for you, Year 5:

What did you find out?

Why do you think this happened?

What further tests could you carry out to confirm your explanation?

Do some research into what happens when solids dissolve in a liquid. Why would some solids dissolve more quickly than others?

(Clue: Look at the particle arrangement!)

Let us know what you find!

## 17 thoughts on “Year 5’s Marvellous Mixtures!”

1. Vivek Chand

I found out that sugar took shorter time than the salt because when it went into the water it dissolved much more quicker.

Then when we put lemonade in it it went down because it was a water bass.

When we put vinegar it dissolved but when we put food coloring
it went in the middle and then stayed down because it wasn’t a water bass

2. Amaan Mustafa

I found out when you mix solid to a liquid it could dissolve.
I learnt that if you add a dissolvable solid to a liquid it will dissolve, for example if you put sugar in side water it will dissolve.
Dissolve means if you put a solid in to a liquid it loses its shape and it also turns in to a liquid.

When we did our investigation we were checking, what salt or sugar will mix with vinegar or water. All of the salt dissolved, because the salt reacted with water. Something, in the water or vinegar must be making the salt or sugar dissolve.

I would check how long it takes sugar or salt if I add it in to water and not stir it. And I want to add salt or sugar in to hot water to see how fast it dissolves.

3. Laiba Wajid

I found out that the light muscardo dissolves the quickest. So to understand the process how to do it. We can do a test to see which ice melts first because 5R and 5M haven’t done this kind of investigation.

Because it’s particuls are joint together for some of the solids.

4. Marhia Haider

I have found out that if you leave salt in water for three minutes it won’t dissolve. however if you stir the water with salt in it will dissolve.

I think the best variable was stirring because it made the salt dissolve faster .

I worked in G.T

5. Asim Munir

We found out that the salt dissolved faster than the sugar, because my timer said 2:06 seconds and Sanam’s said 2:14 seconds.

I think the salt dissolves faster, because it has bigger particles and the sugar has smaller particles. If we were going to do the test again we should time at different times.

6. Aleena Dean

I have found out that the sugar particles dissolves quicker than the salt particles because when we done our investigation, my prediction that the salt particles would dissolve much faster then the salt particles because the sugar particles are bigger than the salt particles.

I think that this happened because when we were thinking and imaging what would happen to the particles we must have thought the opposite to what the real answer was and the real answer was that the sugar particles were much faster than the salt ‘s particles and our prediction was the oppsite.

If needed to change my investigation I would change it by not having any liquid I would have it a certain liquid linker water or something like that. I would also change my investigation i would have a solid which would dissolve quicker like a pebble.

7. Ibrahim El Safi

I found out that salt dissolves quicker than sugar because when we carried out an investigation we used liquid(water) to put the particles(sugar and salt) inside.I thought the sugar was going to be faster but as I stared into the cup,my eyes saw that the sugar didn’t really go well in dissolving.So then I saw the salt and I knew how it dissolved quicker than the sugar, it was because the salt had smaller particles and the sugar had slightly more particles than the salt.The salt dissolved faster than the sugar that is what I found out.

If I was to carry out an investigation I could use water as my liquid and I could change the solid (slightly)into a tablet and flour.

Some solids dissolve in liquid and they are invisible but they are still there and you can only notice that by tasting it,the colour of the liquid doesn’t change.

Some solids dissolve faster than others because when it breaks the links between the particle it spreads out.

8. Serena Mattu

science this week was very interesting, because our thoughts about the particles were wrong, because the sugar dissolved faster whereas, we thought the salt would win because the
particles of the salt were much smaller than the sugar particles.

After doing this experiment i now know that sugar is much more thinner than salt so this was why the sugar dissolved faster than the salt.

9. Halima Memi

In this investigation I found out that salt dissolves quicker than sugar . I know this because I carried out this investigation. I think this is because salt probably has more particles than sugar.

10. Simran Puri

The G&T group found out that salt can not be dissolved in hot or cold water within 3 minutes. It also can not be dissolved without stirring and mixing.

I think this happened because of the temperature of the water and the temperature of the area around us. The salt wasn’t hot or cold and it wouldn’t be able to dissolve. When we poured the salt in the water, we timed it for 3 miuntes and in both hot and cold water, it didn’t dissolve. When we had the cold water and we could stir it a bit, it nearly dissolved but it all didn’t dissolve.

We could use mabye more larger cups and more salt. Then if we use more salt we need some more water. We could do the same process but with more salt and water.

When you dissolve for example ice, you will leave it out in the sun so it will melt down step by step. The particles in a solid are close toghether and are arranged in a regular pattern. If you turn it into a liquid, the particles will still be stuck toghther but they move around each particle.

It depends on the quantity . If it is a large solid, it will take longer. On the other hand, if it is small, then it will take less time.

:)

11. Mehrish Iqbal

I found out that salt dissolved more quicker than sugar.I think that this happened because the salt has smaller particals than sugar.

If we did any other investigation, we could of tried it in sand. We could use fairy liquid and water insted of sugar and salt.

When some solids, such as sugar,they are mixed with water and they dissolve. They break into very,very,very tiny pieces and mix evenly through the water. When a solid turns into a liquid , it is to be soluble. The mixture is called solution. Tiny pieces of the solid are still there in the water, but they are so small we can not see them. That is why water lookes clear but tastes sweet when sugur is dissolved in it.

:)

The shooting stars table found out that the salt dissolves quicker than the sugar. I think this happened because we put more sugar in than the salt the results that we got was that the salt dissolved in 2mins:06sec and the sugar dissolved in 2min:40sec.

If we were to carry out any other kind of investigation we could do yeast and baking powder and see if it just stay there or not or we could stir 1 of them and not stir the other one.

13. Fiza Farooq

I have researched and found that solids like salt are small thats why they dissolve quicker.solids like Sugar are bigger than salt and needs more time to break into tiny parts and dissolve.

14. Fiza Farooq

I have found out that salt can dissolve quicker than sugar.
This is because sugar can only dissolve in kettle water.
Salt can only dissolve if it has been stirred and sugar
can not be dissolved even if it has been stirred.I think
this has happened because we might have added different
temperature in to the water thats why it might have dissolved quicker.
I think to carry out the investigation we should have done the test a few more times to be exact what the answer is.

some solids dissolve more readily in hot waer than cold water.
Mixing materials together forms a miture where two or more
substances are physically but not chemically combined and can be seperated again.
I

15. Plaiza Karan

The G+T group found out that salt can not be dissolved without it being mixed.It will also not dissolve within three minutes without stirring.

I think this happened because of the different heats of the water.Because the salt was neither hot or cold it would not dissolve into and would not be able to dissolve.When we put the salt in the water we timed 3 minutes once the 3 minutes was up the salt was not dissolve.Same when we used cold it was almost dissolving but it did not dissolve completely.I think it needed longer to dissolve.

• Syra Khan

I found out that salt dissolves more pucker than sugar.I know this because we carried out an investagation.This happened because salt has smaller particals than sugar.Some solids dissolve more quicker than others because they have tinyer particals.

• Syra Khan

I found out that salt dissolves more quicker than sugar.I know this because we carried out an investagation.This happened because salt has smaller particals than sugar.Some solids dissolve more quicker than others because they have tinyer particals.