Hi all can anyone tell me what’s the best way to ease a sore throat and chest from acid and heartburn? Would salt water gargle be any Good or would it irritate the burned throat tissues more eveven my mouths burning 
This may be too much info, or not on target. I apologize. You are asking for acid and heartburn.. Reflux Oesophagitis/LPR/Silent Reflux is similar but a little further.
We are made of salt water. Our tears are salt water. I never saw a problem using a warm salt water gargle.
I am far from an expert and am just learning myself. When my throat was exceptionally raw/on fire - the only thing that helped calm it was N-A-C aka N-Acetly-L Cysteine. I take it with my meals.
I am currently taking Olive Leaf, because I had the start of sore throat. It has helped.
I have been taking a tea called Throat Coat by Traditional Medicinals. It contains Licorice-root, slippery elm bark, marshmallow root, cherry bar, fennel fruit, cinnamon bark, sweet orange pee.
I have taken Oil of Oregano.. to stop Phlegm. You can only take it for maximum two weeks at a time..
I am trying to learn a low acid diet, low fat diet for LPR based on books from board certified doctors: Dr. Jaimie Koufman and Jonathan Aviv.
Best of luck, I hope you feel better.
Thank you for your reply I do see if I can purchase some of the things you suggested