Cara Mengukur pH Air dan Tanah Dengan Kertal Lakmus

Joko Warino

10 Feb 202206:20

Summary

TLDRIn this educational video, Joko Warino demonstrates a simple pH test using litmus paper, a common tool among farmers and students. He tests two samples: tap water and soil, explaining the process of dipping the paper into the samples and comparing the resulting color to a reference chart. The video highlights the ease of using litmus paper for basic pH checks, though it points out the method's limitation in providing only rounded pH values without precision. The video concludes with the availability and affordability of litmus paper in local chemical stores, making it a practical tool for educational purposes.

Takeaways

🌿 The video is a tutorial by Joko Warino on testing the pH level of water and soil using pH indicator strips, also known as litmus paper.
🔍 The litmus paper is commonly used by farmers and is available in four colors to indicate different pH levels.
💧 The first sample tested is tap water, and the process involves dipping the litmus paper into the water for about 5-10 seconds.
🏺 The second sample is soil, which is mixed with water before testing with the litmus paper in the same manner as the water sample.
⏱ The testing duration for both samples is approximately 5-10 seconds to allow the paper to change color.
📏 The color change of the litmus paper is then compared to a color chart provided with the product to determine the pH level.
📍 The pH level of the tap water sample is found to be 5, indicating an acidic nature.
📏 For the soil sample, the pH level is also 5, which is the same as the tap water, suggesting a similar acidity level.
🚫 The video mentions that the pH indicator strips or litmus paper provide only an approximate pH value and cannot detect precise values like 4.5 or 4.7.
🛒 The price range for the litmus paper is mentioned to be around 40,000 to 60,000 Indonesian Rupiah, and it is available in various chemical stores.
👍 The video concludes by stating that while the litmus paper is not highly accurate, it is easy and practical for basic pH testing in experiments or to get a rough idea of the pH level.

Q & A

What is the purpose of the video?
-The purpose of the video is to demonstrate how to test the pH level of water and soil using pH indicator strips, also known as litmus paper.
Who is the presenter in the video?
-The presenter in the video is Joko Warino.
What are the two samples that the presenter tests in the video?
-The two samples tested in the video are tap water and soil.
What is the method used to test the pH level of the samples?
-The method used is by dipping the pH indicator strips (litmus paper) into the samples and comparing the resulting color with the color chart provided in the product packaging.
How long should the litmus paper be dipped in the sample for testing?
-The litmus paper should be dipped in the sample for about 5-10 seconds.
What is the pH range indicated by the color of the litmus paper after testing the tap water sample?
-The pH range indicated for the tap water sample is around 5.
Is there a limitation to the accuracy of pH indicator strips or litmus paper?
-Yes, the limitation is that they only provide whole number pH values and cannot detect decimal values such as 4.5 or 4.7.
What is the practicality of using pH indicator strips for testing pH levels?
-While not highly accurate, pH indicator strips are easy to use and can provide a general idea of the pH level for educational purposes or non-detailed assessments.
Where can pH indicator strips typically be purchased and what is their price range?
-They can be purchased at chemical stores and the price range is approximately Rp30,000 to Rp60,000.
What is the presenter's closing statement after the demonstration?
-The presenter ends with a hope that the video is helpful and closes with a greeting of 'assalamualaikum, warahmatullah wabarakatuh'.

Outlines

00:00

🧪 Testing Water and Soil pH with Litmus Paper

In this video segment, the host, Joko Warino, introduces a practical test to determine the pH level of water and soil using litmus paper, commonly known as pH indicator strips. The process involves using two samples: tap water and soil. The host demonstrates how to immerse the litmus paper in the water and soil samples for approximately 5-10 seconds and then compare the resulting color with a color chart provided in the product packaging. The first sample, tap water, shows a pH level of 5. The second sample, soil, also indicates a pH of 5, highlighting the simplicity of this method for determining the pH of both water and soil.

05:01

📏 Limitations and Practicality of pH Indicator Strips

The second paragraph discusses the limitations of using pH indicator strips or litmus paper for measuring the pH levels of water and soil. The host points out that these strips provide only rounded pH values, such as whole numbers from 0 to 14, and cannot detect decimal values like 4.5 or 4.7. Despite this inaccuracy, the host suggests that the strips can be useful for educational purposes or to get a rough estimate of the pH level. The video also mentions the affordability and availability of these strips, with prices ranging from Rp30,000 to Rp60,000, and their common presence in chemical stores. The host concludes by hoping that the video is helpful and ends with a traditional greeting.

Mindmap

Keywords

💡pH indicator

A pH indicator is a substance that changes color in the presence of an acidic or basic solution, commonly used to measure the acidity or alkalinity of a substance. In the video's context, the pH indicator is used to test the pH levels of water and soil samples. The script mentions using pH indicator strips or 'kertas lakmus' to determine if the pH is low or high.

💡pH test

The pH test is a method to determine the acidity or alkalinity of a solution. It is central to the video's theme, as the host, Joko Warino, demonstrates how to perform pH tests on water and soil samples using pH indicator strips. The results of the test are then compared with a color chart provided with the product.

💡kertas lakmus

Kertas lakmus, or litmus paper, is a type of paper that is treated with a pH-sensitive dye. It is used in the script to test the pH level of the samples. The script describes the process of dipping the litmus paper into the water and soil samples and then comparing the resulting color to a reference chart.

💡sample

In the context of the video, a sample refers to a portion of a substance taken for testing or analysis. The script mentions two samples: one of tap water and another of soil, which are tested for their pH levels to understand their acidity or alkalinity.

💡tap water

Tap water is water that comes from a home's plumbing system. In the video, tap water is used as one of the samples to demonstrate the pH testing process. The script shows the process of testing the pH of tap water and comparing the results to determine its acidity or alkalinity.

💡soil

Soil is the upper layer of the earth's surface composed of organic matter, minerals, gases, liquids, and organisms that support life. In the script, soil is used as another sample for pH testing, emphasizing the importance of soil pH for agricultural purposes.

💡color chart

A color chart is a tool used to compare colors systematically. In the video, the color chart is used in conjunction with the pH indicator strips to determine the pH level of the tested samples. The script describes matching the color of the wet litmus paper to the chart to find the corresponding pH value.

💡acidity

Acidity refers to the degree to which a substance can donate a proton or accept an electron pair. In the video, the concept of acidity is explored through the testing of pH levels, with the aim of understanding how acidic or basic the water and soil samples are.

💡alkalinity

Alkalinity is the ability of a solution to neutralize acids to form salts and water. It is the opposite of acidity. The script mentions testing for alkalinity by checking the pH levels of the samples to see if they are basic.

💡practicality

Practicality refers to the quality of being practical or suitable for a particular use. The script highlights the practicality of using pH indicator strips for quick and easy testing of pH levels, despite their potential lack of precision.

💡approximation

Approximation is the act of estimating a value or quantity that is roughly accurate but not exact. The script points out that the pH indicator strips provide an approximate pH value, rounding to the nearest whole number and not detecting decimal values like 4.5 or 4.7.

💡agriculture

Agriculture is the practice of cultivating plants and livestock. The script mentions that the pH testing of soil is particularly relevant to agriculture, as soil pH can significantly affect plant growth and health.

Highlights

Introduction to the process of testing pH levels using pH indicator strips, commonly known as litmus paper.

Explanation of the litmus paper's color indicators, used to determine whether the pH level is low or high.

Demonstration of the pH testing procedure using two samples: tap water and soil.

The first sample tested is tap water, with the pH value determined after dipping the litmus paper for 5-10 seconds.

Comparison of the resulting color on the litmus paper with the pH color scale provided on the product box.

Determination of the tap water's pH level as approximately 5, based on the color match.

Second sample tested is soil, mixed with water to create a testable solution.

Same procedure followed for soil sample, with litmus paper dipped for a few seconds.

Result of soil pH test shows a similar pH level of 5, as indicated by the color match.

Discussion of the ease and practicality of using litmus paper for pH testing.

Highlighting the limitation of litmus paper, which provides only rounded pH values (e.g., 4 or 5) without finer precision.

Mention of litmus paper's suitability for basic practical use but not for detailed or highly accurate measurements.

Price range of litmus paper, generally available from IDR 30,000 to IDR 60,000, and accessible in agricultural stores and chemical supply shops.

Conclusion summarizing the video, apologizing for any shortcomings, and expressing hope that the content was beneficial.

Closing statement with a traditional Islamic greeting.