Question

Acid base and salt making practical file

Answer 1

it makes dilute Hydro chloric acid...may be it is ryt

Answer 2

Hey Mate,

Here Is Your Answer

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Acids, bases and salts
Theme: Making science practical

Learning Outcomes
By the end of this section, you will have:
organised students in small groups to carry out scientific investigations;
set up a ‘circus’ of short experiments (a laboratory parade) to illustrate neutralisation;
organised children into groups to collect data and present it appropriately.

Introduction

Practical work is a really important part of being a scientist and can help students to learn. There a lots of different types of practical work including demonstrations; investigations in which students plan, carry-out and analyse their own experiment and experiments designed to help students learn specific skills or understand scientific ideas. Gaining first hand experience of materials, organisms and processes can increase understanding and assist retention of knowledge. Shared experiences and real objects may also be helpful for students who find English difficult. All practical work requires careful planning and some improvisation. In this unit the activities are all linked to the topic acids, bases and salts. They involve students taking part in an open-ended practical investigation, a circus of short experiments and a practical activity designed to illustrate theory in which they are required to make very careful observations. The activities should fit into your normal teaching. They describe ways of organising familiar experiments that put the students at the centre of their learning.

Organising group work to make and evaluate an indicator-

Sometimes, especially when they are learning a specific technique, students will need detailed instructions about what to do. However, if they are going to develop an understanding of what it means to be a scientist and the confidence to think for themselves, then you need to give them the opportunity to take part in open-ended investigations. During the planning, carrying out and evaluating of an experiment your students will really have to think about what they are doing and why they are doing it. Extracting an indicator from a plant is a good opportunity to let your students think for themselves. They need to know examples of acids and alkalis, but they are unlikely to be asked to describe the method in great detail. If they don’t do quite as you expect then it doesn’t really matter; they will get a great deal of satisfaction from working it out for themselves.

It is likely that some of your students will have heard of the term ‘acids’. The first activity describes an experiment in which they will make an indicator from flower extracts and use it to test different substances. This topic is a good opportunity for you to ‘let go’ and take a risk! You will show them what to do, but not give them detailed instructions (Resource 1 provides some background for the teacher and Resource 2 explains the importance of doing a risk assessment). Leave them to plan the details in their groups. They will get the most out of this sort of activity if you give them the opportunity at the end to think critically about what they did and how they could have done it better.

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Hop It Helps You.