A sample of soil from a vegetable garden was thoroughly crushed, and water added as shown: After you measure the pH of this sample, how would you check that the result for this sample were valid for the whole garden.

After measuring the pH of the soil sample , if we have to check that the result for this sample were valid for the whole garden, we just have to take the sample from the other parts of the garden and repeat the same process.

This apparatus is used to measure the rate of a reaction. Suggest a suitable reagent to use as Y.

The given apparatus is used to measure rate of a reaction. Here, Y indicates a solid that can be used as a reagent with any suitable acid. We can use metals like magnesium, iron, zinc or any carbonate as a reagent.

This apparatus is used to measure the rate of a reaction. Which other piece of apparatus is needed?

The given apparatus is used to measure rate of a reaction. The method for determining a reaction rate is relatively straightforward. A reaction rate is based on change over time, that can be determined by observing the change in concentration of the reactants or products over a certain duration of time. This measuring of time change requires a stopwatch. Thus, this apparatus must be facilitated with a stopwatch to complete the given arrangement.

This apparatus is used to measure the rate of a reaction. Outline the procedure for this experiment.

The given apparatus is used to measure the rate of a reaction. Following are the procedural steps for this experiment: Step 1: Weigh out the required mass of the solid Y. Step 2: Using a measuring cylinder, pour the known volume of acid into the conical flask. Step 3: Add solid Y to the acid in the flask and immediately enclose the flask with the lid and start the stop clock. Step 4: Record the volume of the gas collected by observing the readings of the gas syringe at regular time intervals.

This apparatus is used to measure the rate of a reaction. You must be careful not to use too much of the reagent. Why?

The given apparatus is used to measure the rate of a reaction in the preparation of gas. Here, Y indicates a solid that can be used as a reagent with any suitable acid. We can use metals like magnesium, iron, zinc, or any carbonate. These reagents act as a catalyst where catalyst has the property of increasing the rate of the chemical reaction. The excess use of a reagent can increase the rate of reaction and can result in the excess production of gas that the syringe can hold. This can also lead to the breakage of the flask. Thus, great precaution must be taken while weighing the reagent and an appropriate amount must be used in the experiment.

E M B I B E

Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 19 - In the Lab>Checkup on Chapter 19>Q □

HARD

Upper Secondary: IGCSE

IMPORTANT

Earn 100

Describe how to prepare oxygen gas in the lab.

Important Questions on In the Lab

MEDIUM

Upper Secondary: IGCSE

IMPORTANT

Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 19 - In the Lab>Checkup on Chapter 19>Q 1

A sample of soil from a vegetable garden was thoroughly crushed, and water added as shown:

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Now, using a conical flask, filter funnel, filter paper, universal indicator, and dropping pipette, show how you would measure the $pH$ of the soil.

EASY

Upper Secondary: IGCSE

IMPORTANT

Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 19 - In the Lab>Checkup on Chapter 19>Q 1

A sample of soil from a vegetable garden was thoroughly crushed, and water added as shown:

Question Image

After you measure the $pH$ of this sample, how would you check that the result for this sample were valid for the whole garden.

MEDIUM

Upper Secondary: IGCSE

IMPORTANT

Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 19 - In the Lab>Checkup on Chapter 19>Q 2

Make a drawing of the apparatus labelling the water trough, measuring cylinder, delivery tube, flask, and dropping funnel. This apparatus is used to collect gases in the lab.

EASY

Upper Secondary: IGCSE

IMPORTANT

Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 19 - In the Lab>Checkup on Chapter 19>Q 2

This apparatus is used to collect gases in the lab like hydrogen and carbon dioxide, but not sulfur dioxide. Explain why.

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