How to Use Muratic Acid to Kill Weeds
- 1). Put on your protective clothing and fill your bucket with enough water to give you a 80-percent-water to 20-percent-acid mixture. According to the U.S. Department of Agriculture's Agricultural Research Service the maximum percentage of acid to water should be no more than 20 percent.
- 2). Add the muriatic acid to the water. The mixture should always be acid added to water and never water added to acid. Adding water to the acid can cause a violent reaction and actually propel the acid out of the bucket.
- 3). Pour the mixture into a plastic spray bottle and seal the top. Spray the mixture directly onto the weeds you wish to kill. If there are surrounding plants, take care not to spray them. Due to toxicity of the acid, it is best to spray weeds that are separated from plants that you do not wish to harm. Place the remaining mixture in a plastic container.