Long-term plan section:8.2А Amount of substance

School: 4 SG

Approved:

Date: 7.11.2018

Full name of the teacher:KozhantayevaA

Класс: 8B

Lesson topic

Amount of substance. Moth Avogadro number. Molar mass of matter

Learning objectives that are achieved in this lesson (link to the curriculum)

8.1.1.1 know the mole as a unit for measuring the amount of a substance and know the Avogadro number

8.1.1.2 - be able to calculate the molar masses of compounds

Lessonobjectives

- to form students' skills to understand the difference between the amount of a substance and the number of particles

- to form students' skills to calculate the amount of a substance and use the Avogadro number

- students' understanding of the definition of the molar mass of a substance

EvaluationCriteria

- recognize substances with the same mass that do not have the same number of atoms

- determine the mole, as the number of particles Avogadro

- use the formula to calculate the amount of substance

- use the formula to calculate the molar mass of a substance

Languagegoals

Students can:

- be able to formulate questions and answers about the quantitative characteristics of the substance

Subjectvocabularyandterminology

mol, molar mass as mass of 1 mol, Avogadro number, amount of substance

Instillingvalues

Respect for yourself and others:

- maintaining a healthy lifestyle

Collaboration:

- group work in the classroom forms respect for each other among students

Interdisciplinarycommunication

Physics

Preliminaryknowledge

7.2A Atoms. Molecules. Substances

7.3C Relative atomic mass. The simplest formulas

Ход урока

ScheduledLessonStages

ScheduledLessonActivities

Resources

The beginning of the lesson3min

5 min

Organizing time. The teacher voices the topic of the lesson, lists the learning objectives and the evaluation criteria.

  I. Introduction to the new material:

Forms and methods: brainstorming.

Form of activity: work with the class

The teacher shows a video showing the weighing of coins. Bank employees use the “counting by weighing” method to count the number of coins. Guiding questions from the teacher on the video shown for understanding the new lesson.

Evaluation: Oral teacher feedback.

Presentation

Video "Weighing Coins"

https://www.youtube.com/watch?v=8gZQWcavz1w

Middleofthelesson

8min

2 min

10min

10min

II.Application of new knowledge and skills in practice.

Laboratory work.

Forms and methods: forecasting "counting by weighing"

Form of activity: group

The teacher combines the class in 3 groups using different shapes. Gives each group a handful (a different amount) of coins. Encourages students to take a handful of 1 tenge coins and weigh them.

m (handful of coins) = ...

Requests to calculate the mass of one coin in denominations of 1 tenge 163/100 = 1.63 (g), then the number of coins in handfuls (dividing the mass of handfuls of coins by the mass of one coin). Next, students count manually the number of coins. Did the number of coins counted manually count with the number of coins counted by the “counting by weighing” method? This type of work can be repeated with a different number of coins. Ask students how to get an equal number of coins at 2 and 5 tenge, just not counting them. Students weigh coins. And then they are counted: their number will always be the same.

Differentiation: For more advanced students, suggest a problem situation: add a coin of 5 tenge to a handful of coins of 2 tenge. Ask students why mass does not fit?

Evaluation: Feedback from the teacher on the work done by the students

View video by reference. Explanation of the teacher on the presentation of the terms: the number of substances, the mole and the Avogadro number, give examples.

Show students samples of different substances taken in an amount of 1 mol (water, iron, sulfur, salt). Weigh the dispensed portions of substances and discuss the measurement results. Remind students that we know the relative masses of atoms (analogy with the mass of one coin). Offer them to calculate how many moles of a substance are contained in the portions given to them. Give an idea of ​​the molar mass.

 III. Consolidation of the study:

Forms and methods: the game "Who will calculate the quantities of a substance and other calculations for specified substances?"

Form of activity: individual

Differentiation: Students complete tasks on time. If a student finishes earlier than others, he is given other tasks to compare the molar mass of substances.

Assessment: self-assessment of pupils by assessment criteria.

Instructions laboratory work

Equipment: a handful of coins, scales

Presentation https://bilimland.kz/ru#lesson=11357

Presentation

Endofthelesson

  2 minutes

Feedback from students: "Two stars, one wish."

Homework: students solve problems for calculating the amount of a substance by their mass for different substances and vice versa, by the amount of a substance to calculate the mass of substances

Сборник задач по химии 8 класса

Differentiation

Evaluation

Health&Safety

Students perform tasks on time, a more difficult task for advanced students.

Feedback from the teacher, self-assessment, on the laboratory work of students in the classroom

Health-savingtechnologies.

Safety instructions repeat during laboratory work

Lessonreflexion

Were the objectives of the lesson / learning objectives realistic?

Have all students reached the DH?

If not, why not?

Is the differentiation correct in the lesson?

Have the lesson temporal stages been sustained?

What were the deviations from the lesson plan and why?

Use this section to reflect on the lesson. Answer the most important questions about your lesson from the left column.

Overall rating

What are two aspects of the lesson that went well (think about both teaching and learning)?

one:

2:

What could contribute to improving the lesson (think about both teaching and learning)?

one:

2:

What did I find out during the lesson about the class or the achievements / difficulties of individual students, what should I look for in subsequent lessons?