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Quarter 4 Week 4 Learning Activity Sheet (LAS) no. 4 in SCIENCE 10

The Rate of Dissolving Rock and Powder Sugar Materials: Rock sugar Two (2) drinking glasses (same size), iodized salt, rock salt, spoon, water, watch or timer

Procedure:

1. Pour water up to the same level on two drinking glasses.

2. Take a pinch of iodized salt and drop it in one of the glasses. Do not stir. After one minute, stir the glass slowly until no iodized salt can be seen. Record the time it takes for the iodized salt to be dissolved completely.

3. Repeat procedure no. 2, this time use rock salt.

Tabulate your observation.

. | Time dissolved | Observation

Iodized salt
Rock salt


Analysis:

How much time did it take the iodized salt to dissolve completely? How about the rock salt? Why is this so? Explain your answer.

Note:

The speed or rate of chemical reactions is altered or changed by the following factors:

1. Nature and size of the reactants

2. Concentration of the reactants

3. Temperature

4. Presence of Catalyst

(pls paki ayos ang pag sagot, need ko talaga now.)​

Quarter 4 Week 4 Learning Activity Sheet LAS No 4 In SCIENCE 10 The Rate Of Dissolving Rock And Powder Sugar Materials Rock Sugar Two 2 Drinking Glasses Same Si class=

Sagot :

Jannajoydidn

Answer:

Time dissolved | Observation

Iodized salt about 30 sec. granules are

small

Rock salt about 1 min. granules are

bigger

Analysis:

How much time did it take the iodized salt to dissolve completely? about 30 seconds

How about the rock salt? about 1 minute

Why is this so? iodized salt dissolve faster than rock salt because the granules are smaller so most of it's area is in contact with water, unlike rock salt who's granules are bigger so not all of it's area is exposed to water so it takes longer for it to be dissolved.

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