Today, the science teacher asked us to go home and make a glass of lemonade.

When I got home, I first took out the preparation materials, cold water, lemon, transparent glass, sugar, baking soda and spoon. I started making. I poured 200 ml of cold boiled water into the cup, and then put two spoonfuls of sugar. Then, I squeezed half a lemon cut in advance into the cup. At this time, the water in the cup turned pale milky white. I stirred it in the cup with a spoon and tasted it. It's delicious, sweet and sour, but it still lacks the taste of soda water. Ha ha! Everything is ready except the east wind. Finally, I put a spoonful of baking soda into the cup. At this time, a miracle appeared. Numerous small bubbles immediately appeared in the cup, and the bubbles overflowed the outside of the cup. Slowly, the bubbles became less and the water in the cup turned pale yellow. I thought: this soda must be delicious. I quickly picked up the spoon and tried it. Wow! What is that smell? Didn't it taste just right without baking soda just now? Why is it stale now? And why do small bubbles appear in the water after baking soda is put? So I decided to go online to find out.

Baking soda is a white alkaline powder, which is easily soluble in water. It starts to work after combining with water, releasing carbon dioxide and reacting faster in acidic liquid. Bubbles are carbon dioxide. Oh! The bubbles in the cup are caused by carbon dioxide. The mystery was solved, and then I solved the mystery of why the taste became strange after putting baking soda. After checking the information, I suddenly realized that when using baking soda, the dosage should be controlled well, generally between 1%-2%, not too much, otherwise it will be bitter. Just now, there was too much baking soda, and there was so much stress in making soda.

All right! I decided to do it again. I squeezed a glass of lemon juice this time, but the water didn't change. I put half a spoonful of sugar, and a small spoon of baking soda was replaced by a small spoon of salt. I only put a spoonful of baking soda in it. There should be problems this time, right? I tasted a little with a spoon. As soon as I finished, I dropped the spoon and picked up the cup to drink. I made it!

This time I made lemonade, I not only mastered a unique skill, but also learned a truth: to do one thing, I must have a scientific learning attitude and be serious and rigorous. And even if you fail, don't give up easily, as long as you persist, you will succeed.