alkali

"The peculiarity of meeting six people on a usually deserted trail only struck me later on."

"The antidote neutralised the toxin."

"The box contained old photographs. "

"The spilled cleaning solution released a strong smell of ammonia. "

"The caustic spilled on the science lab table quickly ate away at the plastic. "

"After being teased, her cheeks reddened with embarrassment. "

"The bright red stripe is distinguishing that brand of running shoe from all the others. "

"The tadpole changed into a frog.   Stock prices are constantly changing."

"My mom planted many different vegetables in her garden. "

"The solubility of sugar in hot water is much higher than in cold water, so it dissolves faster when the water is warm. "

"Can you clean the windows today?"

"The lemonade was a clear solution of lemon juice and water. "