Natural Sciences and Technology Grade 6-A - Thunderbolt Kids
Natural Sciences and Technology Grade 6-A - Thunderbolt Kids Natural Sciences and Technology Grade 6-A - Thunderbolt Kids
ACTIVITY: Soluble or insoluble? INSTRUCTIONS: 1. The table from the activity Which mixtures are solutions? has been copied below, and an extra column has been added. 2. Use the extra column to say whether the substance that was mixed with water in the activity is soluble or insoluble. Table: Soluble and insoluble substances. Mixture Sugar and water Yes Salt and water Yes Sand and water No Oil and water No Vinegar and water Yes Copper sulfate and water QUESTIONS: Is the mixture a solution? (Yes or No) Yes Is the substance that was mixed with the water soluble or insoluble? Complete the following sentences by writing soluble or insoluble in the open spaces. 1. Substances that do NOT form solutions when they are mixed with water are called ______________ substances. 2. Substances that form solutions when they are mixed with water are called ______________ substances. 142 Matter and Materials
In the previous chapter, we saw how to separate mixtures. For example, we could hand sort the objects, sieve the larger grains out of the mixture and decant the oil from the top of the water. But what about asolution? Do you think you can separate the sugar from the solution once it has been dissolved? Let's try to find out the answer to this question! INVESTIGATION: How can we recover a solute (sugar) from the solution? AIM (What do you want to find out?): MATERIALS AND APPARATUS: • sugar solution • 2 beakers • funnel • filter paper • evaporating dish • stand • Bunsen burner • matches METHOD: 1. Pour a small amount of the sugar solution into an evaporating dish. 2. Place the dish outside, or on awindowsill, in asunny spot. 3. Leave the dish outside and check regularly to observe what is happening to the sugar solution. 4. Your teacher will demonstrate whether you can also recover the sugar by boiling the solution. 5. Record all your observations in the table below. Chapter 3. Solutions as special mixtures 143
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ACTIVITY: Soluble or insoluble?<br />
INSTRUCTIONS:<br />
1. The table from the activity Which mixtures are solutions? has<br />
been copied below, <strong>and</strong> an extra column has been added.<br />
2. Use the extra column to say whether the substance that was<br />
mixed with water in the activity is soluble or insoluble.<br />
Table: Soluble <strong>and</strong> insoluble substances.<br />
Mixture<br />
Sugar <strong>and</strong> water Yes<br />
Salt <strong>and</strong> water Yes<br />
S<strong>and</strong> <strong>and</strong> water No<br />
Oil <strong>and</strong> water No<br />
Vinegar <strong>and</strong> water Yes<br />
Copper sulfate<br />
<strong>and</strong> water<br />
QUESTIONS:<br />
Is the mixture a<br />
solution? (Yes or<br />
No)<br />
Yes<br />
Is the substance<br />
that was mixed<br />
with the water<br />
soluble or<br />
insoluble?<br />
Complete the following sentences by writing soluble or insoluble<br />
in the open spaces.<br />
1. Substances that do NOT form solutions when they are mixed<br />
with water are called ______________ substances.<br />
2. Substances that form solutions when they are mixed with<br />
water are called ______________ substances.<br />
142 Matter <strong>and</strong> Materials
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